---
OA_place: repository
OA_type: green
_id: '22619'
abstract:
- lang: eng
text: Planar germanium is currently the only semiconducting platform where high-coherence
spin qubits and proximity-induced superconductivity have each been demonstrated.
Recent research into spin qubits in Ge/SiGe heterostructures has focused on increasing
the thickness of the SiGe capping layer, reporting improvements in the electrostatic
noise levels. Meanwhile, heterostructures with thinner capping layers remain rather
unexplored, despite the potential advantages for proximity-induced superconductivity.
Here, we study a Ge/SiGe heterostructure with a thin SiGe cap d - 4nm and investigate
its viability to host low-noise quantum dots. To keep the thermal budget compatible
with superconducting layers, low-temperature oxide deposition processes were developed
and implemented for the gate dielectrics. The charge noise level of the fabricated
devices is estimated to be 1.8 +- 1.0 μeV/ square HZ, comparable to devices
fabricated on shallow heterostructures ( d - 20nm) with high-temperature deposited
oxides. Low charge noise levels, together with the straightforward integration
of superconductors, make this heterostructure an attractive platform for prototyping
hybrid semiconducting–superconducting devices.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: 'We sincerely thank Nick van Loo, Greg Mazur, Dhananjay Joshi, and
Srijit Goswami for their inputs on low-temperature HfOx deposition; Matias Urdampilleta
and Daniel Jirovec for discussions; and Kristen Léonard for the careful reading
of the manuscript. This research was supported by the Scientific Service Units of
ISTA through resources provided by the Miba Machine Shop and the Nanofabrication
facility. The authors acknowledge support from the NOMIS Foundation; the European
Innovation Council Pathfinder Grant No. 101115315 (QuKiT); the FWF Projects with
DOI:10.55776/F86, DOI:10.55776/PAT7682124, and DOI:10.55776/P36507; and the HE-MSCA-PF
project with DOI:10.3030/101150858. ICN2 is supported by the Severo Ochoa Program
from Spanish MCIN/AEI (Grant No.: CEX2021-001214-S) and is funded by the CERCA Program/Generalitat
de Catalunya. ICN2 acknowledges funding from Generalitat de Catalunya (No. 2021SGR00457).
We acknowledge support from the CSIC Interdisciplinary Thematic Platform (PTI+)
on Quantum Technologies (PTI-QTEP+).'
article_number: '033505'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Maksim
full_name: Borovkov, Maksim
id: 1fd0975f-8b61-11ed-b69e-d149334f28c5
last_name: Borovkov
- first_name: Yona A
full_name: Schell, Yona A
id: fe39122d-06bb-11ec-a33b-9e22b40e40a5
last_name: Schell
- first_name: Dina
full_name: Sokolova, Dina
id: 2d2d62f8-72f0-11ef-b75a-8ec3e8a60032
last_name: Sokolova
- first_name: Kevin Etienne Robert
full_name: Roux, Kevin Etienne Robert
id: 53f93ea2-803f-11ed-ab7e-b283135794ef
last_name: Roux
- first_name: Paul
full_name: Falthansl-Scheinecker, Paul
id: 85b43b21-15b2-11ec-abd3-e2c252cc2285
last_name: Falthansl-Scheinecker
- first_name: Giorgio
full_name: Fabris, Giorgio
id: 298cf6f3-1ff6-11ee-9fa6-d94cfa0b3352
last_name: Fabris
- first_name: Devashish C
full_name: Shah, Devashish C
id: de191434-4e7e-11ef-bf4b-9a056fc19fc3
last_name: Shah
orcid: 0009-0007-5829-7707
- first_name: Jaime
full_name: Saez Mollejo, Jaime
id: e0390f72-f6e0-11ea-865d-862393336714
last_name: Saez Mollejo
- first_name: Rodolfo
full_name: Previdi, Rodolfo
id: bc4ea1dc-00ce-11ec-8a4e-b325ca8b9876
last_name: Previdi
- first_name: Inas
full_name: Taha, Inas
last_name: Taha
- first_name: Aziz
full_name: Genç, Aziz
last_name: Genç
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Stefano
full_name: Calcaterra, Stefano
last_name: Calcaterra
- first_name: Afonso De Cerdeira
full_name: Oliveira, Afonso De Cerdeira
last_name: Oliveira
- first_name: Daniel
full_name: Chrastina, Daniel
last_name: Chrastina
- first_name: Giovanni
full_name: Isella, Giovanni
last_name: Isella
- first_name: Anton
full_name: Bubis, Anton
id: 1f6212b5-f795-11ec-9c0c-de4780302890
last_name: Bubis
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Borovkov M, Schell YA, Sokolova D, et al. Low-noise quantum dots in ultra-shallow
Ge/SiGe heterostructures for prototyping hybrid semiconducting–superconducting
devices. Applied Physics Letters. 2026;129(3). doi:10.1063/5.0333142
apa: Borovkov, M., Schell, Y. A., Sokolova, D., Roux, K. E. R., Falthansl-Scheinecker,
P., Fabris, G., … Katsaros, G. (2026). Low-noise quantum dots in ultra-shallow
Ge/SiGe heterostructures for prototyping hybrid semiconducting–superconducting
devices. Applied Physics Letters. AIP Publishing. https://doi.org/10.1063/5.0333142
chicago: Borovkov, Maksim, Yona A Schell, Dina Sokolova, Kevin Etienne Robert Roux,
Paul Falthansl-Scheinecker, Giorgio Fabris, Devashish C Shah, et al. “Low-Noise
Quantum Dots in Ultra-Shallow Ge/SiGe Heterostructures for Prototyping Hybrid
Semiconducting–Superconducting Devices.” Applied Physics Letters. AIP Publishing,
2026. https://doi.org/10.1063/5.0333142.
ieee: M. Borovkov et al., “Low-noise quantum dots in ultra-shallow Ge/SiGe
heterostructures for prototyping hybrid semiconducting–superconducting devices,”
Applied Physics Letters, vol. 129, no. 3. AIP Publishing, 2026.
ista: Borovkov M, Schell YA, Sokolova D, Roux KER, Falthansl-Scheinecker P, Fabris
G, Shah DC, Saez Mollejo J, Previdi R, Taha I, Genç A, Arbiol J, Calcaterra S,
Oliveira ADC, Chrastina D, Isella G, Bubis A, Katsaros G. 2026. Low-noise quantum
dots in ultra-shallow Ge/SiGe heterostructures for prototyping hybrid semiconducting–superconducting
devices. Applied Physics Letters. 129(3), 033505.
mla: Borovkov, Maksim, et al. “Low-Noise Quantum Dots in Ultra-Shallow Ge/SiGe Heterostructures
for Prototyping Hybrid Semiconducting–Superconducting Devices.” Applied Physics
Letters, vol. 129, no. 3, 033505, AIP Publishing, 2026, doi:10.1063/5.0333142.
short: M. Borovkov, Y.A. Schell, D. Sokolova, K.E.R. Roux, P. Falthansl-Scheinecker,
G. Fabris, D.C. Shah, J. Saez Mollejo, R. Previdi, I. Taha, A. Genç, J. Arbiol,
S. Calcaterra, A.D.C. Oliveira, D. Chrastina, G. Isella, A. Bubis, G. Katsaros,
Applied Physics Letters 129 (2026).
corr_author: '1'
das_tickbox: '1'
dataavailabilitystatement: The data that support the findings of this study are openly
available in Institute of Science and Technology repository at http://doi.org/10.15479/AT-ISTA-22242,
Ref. 50.
date_created: 2026-08-02T22:01:53Z
date_published: 2026-07-20T00:00:00Z
date_updated: 2026-08-03T11:08:39Z
day: '20'
department:
- _id: GeKa
- _id: GradSch
- _id: NanoFab
doi: 10.1063/5.0333142
external_id:
arxiv:
- '2602.21363'
fulldoi: https://doi.org/10.1063/5.0333142
intvolume: ' 129'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2602.21363
month: '07'
oa: 1
oa_version: Preprint
project:
- _id: bdc2ca30-d553-11ed-ba76-cf164a5bb811
grant_number: '101115315'
name: Quantum bits with Kitaev Transmons
- _id: 34a66131-11ca-11ed-8bc3-a31681c6b03e
grant_number: F8606
name: 'Center for Correlated Quantum Materials and Solid State Quantum Systems:
Conventional and unconventional topological superconductors'
- _id: 5b9e579c-ab3d-11f0-914f-88754c5b5a3f
grant_number: PAT 7682124
name: Superconducting spin qubits in planar Ge
- _id: bd8bd29e-d553-11ed-ba76-f0070d4b237a
grant_number: P36507
name: Merging spin and superconducting qubits in planar Ge
- _id: 8ea8abf7-16d5-11f0-9cad-c41e56ec8bb3
grant_number: '101150858'
name: Realization and Manipulation of a Planar hybrid superconducting Andreev spin
qubit in Germanium
publication: Applied Physics Letters
publication_identifier:
eissn:
- 1077-3118
issn:
- 0003-6951
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
related_material:
record:
- id: '22242'
relation: research_data
status: public
researchdata_availability: yes
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Low-noise quantum dots in ultra-shallow Ge/SiGe heterostructures for prototyping
hybrid semiconducting–superconducting devices
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 129
year: '2026'
...
---
OA_place: repository
OA_type: green
_id: '23156'
abstract:
- lang: eng
text: "Extracting the current-phase relationship (CPR) of a single superconducting
junction is challenging in practice and traditionally involves embedding the junction
in a larger superconducting circuit containing SQUIDs and/or resonators. Applying
ac driving to the junction has proven to be a viable and less invasive way to
extract information about the few lowest harmonics of the CPR, by locating the
integer and fractional Shapiro steps in the \U0001D43C\U0001D449-curve of the
driven junction. Here, we present an alternative driving-based method that allows
to extract the full harmonic content of a CPR in a relatively noninvasive way,
by fitting the measured critical currents of the driven junction as a function
of driving power. We test our method, both using numerical simulations and in
experiments, and we show that it works accurately."
acknowledgement: 'The authors thank Afonso Oliveira, Stefano Calcaterra, Daniel Chrastina,
and Giovanni Isella for providing the Ge/SiGe heterostructure. This work was supported
by the Research Council of Norway through its Centers of Excellence funding scheme,
Project No. 262633, “QuSpin,” the FWF Project with DOI:10.55776/PAT7682124, OeAD
“ISTA Austria: ISTernship Summer Programme, Non-EU countries” (Ref. No.: MPC-2025-00945),
the Spanish Comunidad de Madrid (CM) “Talento Program” (Project No. 2022-T1/IND-24070),
and the Spanish Ministry of Science, Innovation, and Universities through Grants
No. CEX2024-001445-S (Severo Ochoa Centres of Excellence program) and No. PID2022-140552NA-I00,
funded by MCIN/AEI/10.13039/501100011033.'
article_number: '044017'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Maxim
full_name: Tjøtta, Maxim
last_name: Tjøtta
- first_name: Devashish C
full_name: Shah, Devashish C
id: de191434-4e7e-11ef-bf4b-9a056fc19fc3
last_name: Shah
orcid: 0009-0007-5829-7707
- first_name: Kanishk
full_name: Modi, Kanishk
id: f05345fd-900f-11f1-bfd8-8c0b6eadcc7f
last_name: Modi
- first_name: Marco
full_name: Valentini, Marco
id: C0BB2FAC-D767-11E9-B658-BC13E6697425
last_name: Valentini
- first_name: Rubén
full_name: Seoane Souto, Rubén
last_name: Seoane Souto
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
- first_name: Jeroen
full_name: Danon, Jeroen
last_name: Danon
citation:
ama: Tjøtta M, Shah DC, Modi K, et al. Fast-driving spectroscopy of current-phase
relationships of individual Josephson elements. Physical Review Applied.
2026;26(4). doi:10.1103/d3gl-qntm
apa: Tjøtta, M., Shah, D. C., Modi, K., Valentini, M., Seoane Souto, R., Katsaros,
G., & Danon, J. (2026). Fast-driving spectroscopy of current-phase relationships
of individual Josephson elements. Physical Review Applied. American Physical
Society. https://doi.org/10.1103/d3gl-qntm
chicago: Tjøtta, Maxim, Devashish C Shah, Kanishk Modi, Marco Valentini, Rubén Seoane
Souto, Georgios Katsaros, and Jeroen Danon. “Fast-Driving Spectroscopy of Current-Phase
Relationships of Individual Josephson Elements.” Physical Review Applied.
American Physical Society, 2026. https://doi.org/10.1103/d3gl-qntm.
ieee: M. Tjøtta et al., “Fast-driving spectroscopy of current-phase relationships
of individual Josephson elements,” Physical Review Applied, vol. 26, no.
4. American Physical Society, 2026.
ista: Tjøtta M, Shah DC, Modi K, Valentini M, Seoane Souto R, Katsaros G, Danon
J. 2026. Fast-driving spectroscopy of current-phase relationships of individual
Josephson elements. Physical Review Applied. 26(4), 044017.
mla: Tjøtta, Maxim, et al. “Fast-Driving Spectroscopy of Current-Phase Relationships
of Individual Josephson Elements.” Physical Review Applied, vol. 26, no.
4, 044017, American Physical Society, 2026, doi:10.1103/d3gl-qntm.
short: M. Tjøtta, D.C. Shah, K. Modi, M. Valentini, R. Seoane Souto, G. Katsaros,
J. Danon, Physical Review Applied 26 (2026).
das_tickbox: '1'
dataavailabilitystatement: The data that support the findings of this article are
openly available at [10.5281/zenodo.22646275].
date_created: 2026-10-18T22:01:52Z
date_published: 2026-10-01T00:00:00Z
date_updated: 2026-10-19T07:25:01Z
day: '01'
department:
- _id: GeKa
- _id: GradSch
doi: 10.1103/d3gl-qntm
external_id:
arxiv:
- '2511.14313'
fulldoi: https://doi.org/10.1103/d3gl-qntm
intvolume: ' 26'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2511.14313
month: '10'
oa: 1
oa_version: Preprint
project:
- _id: 5b9e579c-ab3d-11f0-914f-88754c5b5a3f
grant_number: PAT 7682124
name: Superconducting spin qubits in planar Ge
publication: Physical Review Applied
publication_identifier:
eissn:
- 2331-7019
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
researchdata_availability: yes
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Fast-driving spectroscopy of current-phase relationships of individual Josephson
elements
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 26
year: '2026'
...
---
APC_amount: 3036,92 EUR
DOAJ_listed: '1'
OA_place: publisher
OA_type: hybrid
PlanS_conform: '1'
_id: '19597'
abstract:
- lang: eng
text: Superconductor–semiconductor hybrid systems play a crucial role in realizing
nanoscale quantum devices, including hybrid qubits, Majorana bound states, and
Kitaev chains. For such hybrid devices, subgap states play a prominent role in
their operation. In this paper, we study these subgap states via Coulomb and tunneling
spectroscopy through a superconducting island defined in a semiconductor nanowire
fully coated by a superconductor. We systematically explore regimes ranging from
an almost decoupled island to the open configuration. In the weak-coupling regime,
the experimental observations are very similar in the absence of a magnetic field
and when one flux quantum pierces the superconducting shell. Conversely, in the
strong-coupling regime, significant distinctions emerge between the two cases.
We attribute this distinct behavior to the existence of subgap states at one flux
quantum, which become observable only for sufficiently strong coupling to the
leads. We support our interpretation using a simple model to describe transport
through the island. Our study highlights the importance of studying a broad range
of tunnel couplings for understanding the rich physics of hybrid devices.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: This research was supported by the Scientific Service Units of ISTA,
through resources provided by the MIBA Machine Shop and the Nanofabrication facility.
This research and related results were made possible with the support of the FWF
Project with DOI10.55776/F86. We acknowledge support from the European Research
Council under the European Unions Horizon 2020 research and innovation programme
under Grant Agreement No. 856526, the Swedish Research Council under Grant Agreement
No. 2020-03412, the Spanish Comunidad de Madrid (CM) “Talento Program” (Project
No. 2022-T1/IND-24070), the Spanish Ministry of Science, innovation, and Universities
through Grant PID2022-140552NA-I00 and NanoLund.
article_number: '023022'
article_processing_charge: Yes
article_type: original
author:
- first_name: Marco
full_name: Valentini, Marco
id: C0BB2FAC-D767-11E9-B658-BC13E6697425
last_name: Valentini
- first_name: Rubén Seoane
full_name: Souto, Rubén Seoane
last_name: Souto
- first_name: Maksim
full_name: Borovkov, Maksim
id: 1fd0975f-8b61-11ed-b69e-d149334f28c5
last_name: Borovkov
- first_name: Peter
full_name: Krogstrup, Peter
last_name: Krogstrup
- first_name: Yigal
full_name: Meir, Yigal
last_name: Meir
- first_name: Martin
full_name: Leijnse, Martin
last_name: Leijnse
- first_name: Jeroen
full_name: Danon, Jeroen
last_name: Danon
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: 'Valentini M, Souto RS, Borovkov M, et al. Subgap transport in superconductor-semiconductor
hybrid islands: Weak and strong coupling regimes. Physical Review Research.
2025;7(2). doi:10.1103/PhysRevResearch.7.023022'
apa: 'Valentini, M., Souto, R. S., Borovkov, M., Krogstrup, P., Meir, Y., Leijnse,
M., … Katsaros, G. (2025). Subgap transport in superconductor-semiconductor hybrid
islands: Weak and strong coupling regimes. Physical Review Research. American
Physical Society. https://doi.org/10.1103/PhysRevResearch.7.023022'
chicago: 'Valentini, Marco, Rubén Seoane Souto, Maksim Borovkov, Peter Krogstrup,
Yigal Meir, Martin Leijnse, Jeroen Danon, and Georgios Katsaros. “Subgap Transport
in Superconductor-Semiconductor Hybrid Islands: Weak and Strong Coupling Regimes.”
Physical Review Research. American Physical Society, 2025. https://doi.org/10.1103/PhysRevResearch.7.023022.'
ieee: 'M. Valentini et al., “Subgap transport in superconductor-semiconductor
hybrid islands: Weak and strong coupling regimes,” Physical Review Research,
vol. 7, no. 2. American Physical Society, 2025.'
ista: 'Valentini M, Souto RS, Borovkov M, Krogstrup P, Meir Y, Leijnse M, Danon
J, Katsaros G. 2025. Subgap transport in superconductor-semiconductor hybrid islands:
Weak and strong coupling regimes. Physical Review Research. 7(2), 023022.'
mla: 'Valentini, Marco, et al. “Subgap Transport in Superconductor-Semiconductor
Hybrid Islands: Weak and Strong Coupling Regimes.” Physical Review Research,
vol. 7, no. 2, 023022, American Physical Society, 2025, doi:10.1103/PhysRevResearch.7.023022.'
short: M. Valentini, R.S. Souto, M. Borovkov, P. Krogstrup, Y. Meir, M. Leijnse,
J. Danon, G. Katsaros, Physical Review Research 7 (2025).
corr_author: '1'
date_created: 2025-04-20T22:01:28Z
date_published: 2025-04-01T00:00:00Z
date_updated: 2026-06-11T09:13:12Z
day: '01'
ddc:
- '530'
department:
- _id: GeKa
doi: 10.1103/PhysRevResearch.7.023022
file:
- access_level: open_access
checksum: 535351066e9c900340ef014893a09ac8
content_type: application/pdf
creator: dernst
date_created: 2025-04-22T09:00:08Z
date_updated: 2025-04-22T09:00:08Z
file_id: '19604'
file_name: 2025_PhysReviewResearch_Valentini.pdf
file_size: 1977581
relation: main_file
success: 1
file_date_updated: 2025-04-22T09:00:08Z
fulldoi: https://doi.org/10.1103/PhysRevResearch.7.023022
has_accepted_license: '1'
intvolume: ' 7'
issue: '2'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
project:
- _id: 34a66131-11ca-11ed-8bc3-a31681c6b03e
grant_number: F8606
name: 'Center for Correlated Quantum Materials and Solid State Quantum Systems:
Conventional and unconventional topological superconductors'
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Subgap transport in superconductor-semiconductor hybrid islands: Weak and
strong coupling regimes'
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 7
year: '2025'
...
---
OA_place: publisher
OA_type: hybrid
_id: '20594'
abstract:
- lang: eng
text: (Scanning) transmission electron microscopy ((S)TEM) has significantly advanced
materials science but faces challenges in correlating precise atomic structure
information with the functional properties of devices due to its time-intensive
nature. To address this, an analytical workflow is introduced for the holistic
characterization, modelling, and simulation of device heterostructures. This workflow
automates the experimental (S)TEM data analysis, providing an in-depth characterization
of crystallographic information, 3D orientation, elemental composition, and strain
distribution. It reduces a process that typically takes days for a trained human
into an automatic routine solved in minutes. Utilizing a physics-guided artificial
intelligence model, it generates representative descriptions of materials and
samples. The workflow culminates in creating digital twins of systems limited
with at least one axis of translational invariance –3D finite element and atomic
models of millions of atoms–enabling simulations that provide crucial insights
into device behavior in practical applications. Demonstrated with SiGe planar
heterostructures for scalable spin qubits, the workflow links digital twins to
theoretical properties, revealing how atomic structure impacts materials and functional
properties such as spatially-resolved phononic or electronic characteristics,
or (inverse) spin orbit lengths. The versatility of the workflow is demonstrated
through its application to a wide array of materials systems, device configurations,
and sample morphologies.
acknowledgement: 'ICN2 acknowledged funding from Generalitat de Catalunya 2021SGR00457,
2021SGR00997 and 2021SGR01519. The authors thank support from the project AMaDE
(PID2023-149158OB-C43), funded by MCIN/ AEI/10.13039/501100011033/. This study was
part of the Advanced Materials programme and was supported by MCIN with funding
from European Union NextGenerationEU (PRTR-C17.I1) and by Generalitat de Catalunya
(In-CAEM Project). The authors acknowledged support from CSIC Interdisciplinary
Thematic Platform (PTI+) on Quantum Technologies (PTI-QTEP+). This research work
had been funded by the European Commission – NextGenerationEU (Regulation EU 2020/2094),
through CSIC''s Quantum Technologies Platform (QTEP). ICN2 was supported by the
Severo Ochoa program from Spanish MCIN / AEI (Grant No.: CEX2021-001214-S) and was
funded by the CERCA Programme / Generalitat de Catalunya. Part of the present work
had been performed in the framework of Universitat Autònoma de Barcelona Materials
Science PhD program. I.P.H. acknowledged funding from AGAUR-FI scholarship (2023FI-00268)
Joan Oró of the Secretariat of Universities of the Generalitat of Catalonia and
the European SocialPlus Fund. M.B. acknowledged support from SUR Generalitat de
Catalunya and the EU Social Fund; project ref. 2020 FI 00103. This study was supported
by EU HORIZON INFRA TECH 2022 project IMPRESS (Ref.: 101094299). Authors acknowledged
the use of instrumentation as well as the technical advice provided by the Joint
Electron Microscopy Center at ALBA (JEMCA). ICN2 acknowledged funding from Grant
IU16-014206 (METCAM-FIB) funded by the European Union through the European Regional
Development Fund (ERDF), with the support of the Ministry of Research and Universities,
Generalitat de Catalunya. ICN2 was a founding member of e-DREAM.[135] S.R. was also
supported by MICIN with European funds NextGenerationEU (PRTRC17.I1) funded by Generalitat
de Catalunya. P.O. acknowledged support from the EU MaX CoE (Grant No. 101093374),
Grants No. PCI2022-134972-2 and No. PID2022-139776NB-C62 funded by the Spanish MCIN/AEI/10.13039/501100011033
and by the ERDF, A way of making Europe.The authors thank the Catalan Quantum Academy
for support. The authors acknowledged Dámaso Torres for his support in designing
the graphical material.'
article_number: e06785
article_processing_charge: Yes (in subscription journal)
article_type: original
arxiv: 1
author:
- first_name: Marc
full_name: Botifoll, Marc
last_name: Botifoll
- first_name: Ivan
full_name: Pinto-Huguet, Ivan
last_name: Pinto-Huguet
- first_name: Enzo
full_name: Rotunno, Enzo
last_name: Rotunno
- first_name: Thomas
full_name: Galvani, Thomas
last_name: Galvani
- first_name: Catalina
full_name: Coll, Catalina
last_name: Coll
- first_name: Payam Habibzadeh
full_name: Kavkani, Payam Habibzadeh
last_name: Kavkani
- first_name: Maria Chiara
full_name: Spadaro, Maria Chiara
last_name: Spadaro
- first_name: Yann Michel
full_name: Niquet, Yann Michel
last_name: Niquet
- first_name: Martin Børstad
full_name: Eriksen, Martin Børstad
last_name: Eriksen
- first_name: Sara
full_name: Martí-Sánchez, Sara
last_name: Martí-Sánchez
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
- first_name: Giordano
full_name: Scappucci, Giordano
last_name: Scappucci
- first_name: Peter
full_name: Krogstrup, Peter
last_name: Krogstrup
- first_name: Giovanni
full_name: Isella, Giovanni
last_name: Isella
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
- first_name: Gonzalo
full_name: Merino, Gonzalo
last_name: Merino
- first_name: Pablo
full_name: Ordejón, Pablo
last_name: Ordejón
- first_name: Stephan
full_name: Roche, Stephan
last_name: Roche
- first_name: Vincenzo
full_name: Grillo, Vincenzo
last_name: Grillo
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
citation:
ama: 'Botifoll M, Pinto-Huguet I, Rotunno E, et al. Artificial intelligence-assisted
workflow for transmission electron microscopy: From data analysis automation to
materials knowledge unveiling. Advanced Materials. 2025. doi:10.1002/adma.202506785'
apa: 'Botifoll, M., Pinto-Huguet, I., Rotunno, E., Galvani, T., Coll, C., Kavkani,
P. H., … Arbiol, J. (2025). Artificial intelligence-assisted workflow for transmission
electron microscopy: From data analysis automation to materials knowledge unveiling.
Advanced Materials. Wiley. https://doi.org/10.1002/adma.202506785'
chicago: 'Botifoll, Marc, Ivan Pinto-Huguet, Enzo Rotunno, Thomas Galvani, Catalina
Coll, Payam Habibzadeh Kavkani, Maria Chiara Spadaro, et al. “Artificial Intelligence-Assisted
Workflow for Transmission Electron Microscopy: From Data Analysis Automation to
Materials Knowledge Unveiling.” Advanced Materials. Wiley, 2025. https://doi.org/10.1002/adma.202506785.'
ieee: 'M. Botifoll et al., “Artificial intelligence-assisted workflow for
transmission electron microscopy: From data analysis automation to materials knowledge
unveiling,” Advanced Materials. Wiley, 2025.'
ista: 'Botifoll M, Pinto-Huguet I, Rotunno E, Galvani T, Coll C, Kavkani PH, Spadaro
MC, Niquet YM, Eriksen MB, Martí-Sánchez S, Katsaros G, Scappucci G, Krogstrup
P, Isella G, Cabot A, Merino G, Ordejón P, Roche S, Grillo V, Arbiol J. 2025.
Artificial intelligence-assisted workflow for transmission electron microscopy:
From data analysis automation to materials knowledge unveiling. Advanced Materials.,
e06785.'
mla: 'Botifoll, Marc, et al. “Artificial Intelligence-Assisted Workflow for Transmission
Electron Microscopy: From Data Analysis Automation to Materials Knowledge Unveiling.”
Advanced Materials, e06785, Wiley, 2025, doi:10.1002/adma.202506785.'
short: M. Botifoll, I. Pinto-Huguet, E. Rotunno, T. Galvani, C. Coll, P.H. Kavkani,
M.C. Spadaro, Y.M. Niquet, M.B. Eriksen, S. Martí-Sánchez, G. Katsaros, G. Scappucci,
P. Krogstrup, G. Isella, A. Cabot, G. Merino, P. Ordejón, S. Roche, V. Grillo,
J. Arbiol, Advanced Materials (2025).
date_created: 2025-11-02T23:01:35Z
date_published: 2025-10-22T00:00:00Z
date_updated: 2025-12-01T15:12:53Z
day: '22'
ddc:
- '530'
department:
- _id: GeKa
doi: 10.1002/adma.202506785
external_id:
arxiv:
- '2411.01024'
isi:
- '001597428400001'
fulldoi: https://doi.org/10.1002/adma.202506785
has_accepted_license: '1'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1002/adma.202506785
month: '10'
oa: 1
oa_version: Published Version
publication: Advanced Materials
publication_identifier:
eissn:
- 1521-4095
issn:
- 0935-9648
publication_status: epub_ahead
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Artificial intelligence-assisted workflow for transmission electron microscopy:
From data analysis automation to materials knowledge unveiling'
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2025'
...
---
APC_amount: 1260 EUR
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
PlanS_conform: '1'
_id: '20664'
abstract:
- lang: eng
text: Conference travel contributes to the climate footprint of academic research.
Here, we provide a quantitative estimate of the carbon emissions associated with
conference attendance by analyzing travel data from participants of 10 international
conferences in the field of magnetic resonance, namely EUROMAR, ENC and ICMRBS.
We find that attending a EUROMAR conference produces, on average, more than 1 t CO2 eq..
For the analyzed conferences outside Europe, the corresponding value is about
2–3 times higher, on average, with intercontinental trips amounting to up to 5 t.
We compare these conference-related emissions to other activities associated with
research and show that conference travel is a substantial portion of the total
climate footprint of a researcher in magnetic resonance. We explore several strategies
to reduce these emissions, including the impact of selecting conference venues
more strategically and the possibility of decentralized conferences. Through a
detailed comparison of train versus air travel – accounting for both direct and
infrastructure-related emissions – we demonstrate that train travel offers considerable
carbon savings. These data may provide a basis for strategic choices of future
conferences in the field and for individuals deciding on their conference attendance.
acknowledgement: 'First and foremost, we are grateful to the conference organizers
who have provided data, either in the form of tables or by pointing us to abstract
books. We thank the reviewers and the handling editor (Gottfried Otting) for the
careful reading and suggestions. This project emerged from an interactive course
about energy and climate, held at IST Austria by Jeroen Dobbelaere, Georgios Katsaros
and Paul Schanda. We are grateful to ISTA''s Graduate School for enabling this interdisciplinary
course and to all participating students. We thank the following persons for discussions
and/or comments about the manuscript: Helene Van Melckebeke, Mei Hong, Jeff Hoch,
Gottfried Otting and Matthias Ernst. For the preparation of the manuscript, AI tools
have been used, namely for finding relevant literature (ChatGPT) and for correcting
the text (Writefull, within Overleaf LaTeX).'
article_processing_charge: Yes
article_type: original
author:
- first_name: Lucky
full_name: Kapoor, Lucky
id: 84b9700b-15b2-11ec-abd3-831089e67615
last_name: Kapoor
orcid: 0000-0001-8319-2148
- first_name: Natalia
full_name: Ruzickova, Natalia
id: D2761128-D73D-11E9-A1BF-BA0DE6697425
last_name: Ruzickova
- first_name: Predrag
full_name: Zivadinovic, Predrag
id: 68AA0E5A-AFDA-11E9-9994-141DE6697425
last_name: Zivadinovic
- first_name: Valentin
full_name: Leitner, Valentin
id: 4c665ce3-0016-11ec-bea0-e44de7a4fa3d
last_name: Leitner
- first_name: Maria A
full_name: Sisak, Maria A
id: 44A03D04-AEA4-11E9-B225-EA2DE6697425
last_name: Sisak
- first_name: Cecelia N
full_name: Mweka, Cecelia N
id: 2a69ab4b-896a-11ed-bdf8-cb8641cf2b21
last_name: Mweka
- first_name: Jeroen A
full_name: Dobbelaere, Jeroen A
id: c15a5412-de82-11ed-b809-8dc1aa996e40
last_name: Dobbelaere
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
- first_name: Paul
full_name: Schanda, Paul
id: 7B541462-FAF6-11E9-A490-E8DFE5697425
last_name: Schanda
orcid: 0000-0002-9350-7606
citation:
ama: 'Kapoor L, Ruzickova N, Zivadinovic P, et al. Quantifying the carbon footprint
of conference travel: The case of NMR meetings. Magnetic Resonance. 2025;6(2):243-256.
doi:10.5194/mr-6-243-2025'
apa: 'Kapoor, L., Ruzickova, N., Zivadinovic, P., Leitner, V., Sisak, M. A., Mweka,
C. N., … Schanda, P. (2025). Quantifying the carbon footprint of conference travel:
The case of NMR meetings. Magnetic Resonance. Copernicus Publications.
https://doi.org/10.5194/mr-6-243-2025'
chicago: 'Kapoor, Lucky, Natalia Ruzickova, Predrag Zivadinovic, Valentin Leitner,
Maria A Sisak, Cecelia N Mweka, Jeroen A Dobbelaere, Georgios Katsaros, and Paul
Schanda. “Quantifying the Carbon Footprint of Conference Travel: The Case of NMR
Meetings.” Magnetic Resonance. Copernicus Publications, 2025. https://doi.org/10.5194/mr-6-243-2025.'
ieee: 'L. Kapoor et al., “Quantifying the carbon footprint of conference
travel: The case of NMR meetings,” Magnetic Resonance, vol. 6, no. 2. Copernicus
Publications, pp. 243–256, 2025.'
ista: 'Kapoor L, Ruzickova N, Zivadinovic P, Leitner V, Sisak MA, Mweka CN, Dobbelaere
JA, Katsaros G, Schanda P. 2025. Quantifying the carbon footprint of conference
travel: The case of NMR meetings. Magnetic Resonance. 6(2), 243–256.'
mla: 'Kapoor, Lucky, et al. “Quantifying the Carbon Footprint of Conference Travel:
The Case of NMR Meetings.” Magnetic Resonance, vol. 6, no. 2, Copernicus
Publications, 2025, pp. 243–56, doi:10.5194/mr-6-243-2025.'
short: L. Kapoor, N. Ruzickova, P. Zivadinovic, V. Leitner, M.A. Sisak, C.N. Mweka,
J.A. Dobbelaere, G. Katsaros, P. Schanda, Magnetic Resonance 6 (2025) 243–256.
corr_author: '1'
date_created: 2025-11-23T23:01:39Z
date_published: 2025-11-10T00:00:00Z
date_updated: 2026-06-10T08:45:11Z
day: '10'
ddc:
- '000'
department:
- _id: JoFi
- _id: GaTk
- _id: JoCs
- _id: EvBe
- _id: TaHa
- _id: GradSch
- _id: GeKa
- _id: PaSc
doi: 10.5194/mr-6-243-2025
file:
- access_level: open_access
checksum: c63dd47b0e77f9451821436bb77d27c9
content_type: application/pdf
creator: dernst
date_created: 2025-11-24T08:25:19Z
date_updated: 2025-11-24T08:25:19Z
file_id: '20672'
file_name: 2025_MagneticResonance_Kapoor.pdf
file_size: 3081399
relation: main_file
success: 1
file_date_updated: 2025-11-24T08:25:19Z
fulldoi: https://doi.org/10.5194/mr-6-243-2025
has_accepted_license: '1'
intvolume: ' 6'
issue: '2'
language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
page: 243-256
project:
- _id: B67AFEDC-15C9-11EA-A837-991A96BB2854
name: IST Austria Open Access Fund
publication: Magnetic Resonance
publication_identifier:
eissn:
- 2699-0016
publication_status: published
publisher: Copernicus Publications
quality_controlled: '1'
related_material:
link:
- description: News on ISTA website
relation: research_data
url: https://ista.ac.at/en/news/carbon-footprint-of-conference-travel/
record:
- id: '20242'
relation: research_data
status: public
scopus_import: '1'
status: public
title: 'Quantifying the carbon footprint of conference travel: The case of NMR meetings'
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 6
year: '2025'
...
---
OA_place: publisher
OA_type: hybrid
PlanS_conform: '1'
_id: '20730'
abstract:
- lang: eng
text: Radio-frequency measurements could satisfy DiVincenzo’s readout criterion
in future large-scale solid-state quantum processors, as they allow for high bandwidths
and frequency multiplexing. However, the scalability potential of this readout
technique can only be leveraged if quantum device tuning is performed using exclusively
radio-frequency measurements, that is, without resorting to current measurements.
We demonstrate an algorithm that performs automatic coarse tuning of double quantum
dots with only radio-frequency measurements by exploiting their bandwidth and
impedance matching. The tuning was completed within a few minutes with minimal
prior knowledge about the device. Our results show that it is possible to eliminate
the need for transport measurements for quantum-dot tuning, paving the way for
more scalable device architectures.
acknowledged_ssus:
- _id: NanoFab
acknowledgement: We thank Nicholas Sim for providing help with the rf cavities and
David Craig for his feedback on the paper. This work was supported by the Royal
Society (URF-R1-191150), the EPSRC National Quantum Technology Hub in Networked
Quantum Information Technology (EP/M013243/1), Quantum Technology Capital (EP/N014995/1),
EPSRC Platform Grant (EP/R029229/1), the European Research Council (Grant Agreement
948932), the Scientific Service Units of IST Austria through resources provided
by the nanofabrication facility, the FWF-P 30207, and FWF-I 05060 projects, and
Grant No. FQXi-IAF19-01 from the Foundational Questions Institute Fund, a donor-advised
fund of Silicon Valley Community Foundation.
article_number: '054030'
article_processing_charge: Yes (in subscription journal)
article_type: original
author:
- first_name: Barnaby
full_name: Van Straaten, Barnaby
last_name: Van Straaten
- first_name: Federico
full_name: Fedele, Federico
last_name: Fedele
- first_name: Florian
full_name: Vigneau, Florian
last_name: Vigneau
- first_name: Joseph
full_name: Hickie, Joseph
last_name: Hickie
- first_name: Daniel
full_name: Jirovec, Daniel
id: 4C473F58-F248-11E8-B48F-1D18A9856A87
last_name: Jirovec
orcid: 0000-0002-7197-4801
- first_name: Andrea
full_name: Ballabio, Andrea
last_name: Ballabio
- first_name: Daniel
full_name: Chrastina, Daniel
last_name: Chrastina
- first_name: Giovanni
full_name: Isella, Giovanni
last_name: Isella
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
- first_name: Natalia
full_name: Ares, Natalia
last_name: Ares
citation:
ama: Van Straaten B, Fedele F, Vigneau F, et al. All-rf-based coarse-tuning algorithm
for quantum devices using machine learning. Physical Review Applied. 2025;24(5).
doi:10.1103/v11m-dbhm
apa: Van Straaten, B., Fedele, F., Vigneau, F., Hickie, J., Jirovec, D., Ballabio,
A., … Ares, N. (2025). All-rf-based coarse-tuning algorithm for quantum devices
using machine learning. Physical Review Applied. American Physical Society.
https://doi.org/10.1103/v11m-dbhm
chicago: Van Straaten, Barnaby, Federico Fedele, Florian Vigneau, Joseph Hickie,
Daniel Jirovec, Andrea Ballabio, Daniel Chrastina, Giovanni Isella, Georgios Katsaros,
and Natalia Ares. “All-Rf-Based Coarse-Tuning Algorithm for Quantum Devices Using
Machine Learning.” Physical Review Applied. American Physical Society,
2025. https://doi.org/10.1103/v11m-dbhm.
ieee: B. Van Straaten et al., “All-rf-based coarse-tuning algorithm for quantum
devices using machine learning,” Physical Review Applied, vol. 24, no.
5. American Physical Society, 2025.
ista: Van Straaten B, Fedele F, Vigneau F, Hickie J, Jirovec D, Ballabio A, Chrastina
D, Isella G, Katsaros G, Ares N. 2025. All-rf-based coarse-tuning algorithm for
quantum devices using machine learning. Physical Review Applied. 24(5), 054030.
mla: Van Straaten, Barnaby, et al. “All-Rf-Based Coarse-Tuning Algorithm for Quantum
Devices Using Machine Learning.” Physical Review Applied, vol. 24, no.
5, 054030, American Physical Society, 2025, doi:10.1103/v11m-dbhm.
short: B. Van Straaten, F. Fedele, F. Vigneau, J. Hickie, D. Jirovec, A. Ballabio,
D. Chrastina, G. Isella, G. Katsaros, N. Ares, Physical Review Applied 24 (2025).
date_created: 2025-12-07T23:02:01Z
date_published: 2025-11-01T00:00:00Z
date_updated: 2025-12-09T14:49:35Z
day: '01'
ddc:
- '530'
department:
- _id: GeKa
doi: 10.1103/v11m-dbhm
file:
- access_level: open_access
checksum: 9906b32c7e3c79ed13d05ef88ff15586
content_type: application/pdf
creator: dernst
date_created: 2025-12-09T13:34:38Z
date_updated: 2025-12-09T13:34:38Z
file_id: '20748'
file_name: 2025_PhysReviewApplied_vanStraaten.pdf
file_size: 5754118
relation: main_file
success: 1
file_date_updated: 2025-12-09T13:34:38Z
fulldoi: https://doi.org/10.1103/v11m-dbhm
has_accepted_license: '1'
intvolume: ' 24'
issue: '5'
language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
project:
- _id: 2641CE5E-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P30207
name: Hole spin orbit qubits in Ge quantum wells
- _id: c0977eea-5a5b-11eb-8a69-a862db0cf4d1
grant_number: I05060
name: High impedance circuit quantum electrodynamics with hole spins
publication: Physical Review Applied
publication_identifier:
eissn:
- 2331-7019
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
related_material:
record:
- id: '20750'
relation: research_data
status: public
scopus_import: '1'
status: public
title: All-rf-based coarse-tuning algorithm for quantum devices using machine learning
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 24
year: '2025'
...
---
APC_amount: 7068 EUR
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '19401'
abstract:
- lang: eng
text: High kinetic inductance superconductors are gaining increasing interest for
the realisation of qubits, amplifiers and detectors. Moreover, thanks to their
high impedance, quantum buses made of such materials enable large zero-point fluctuations
of the voltage, boosting the coupling rates to spin and charge qubits. However,
fully exploiting the potential of disordered or granular superconductors is challenging,
as their inductance and, therefore, impedance at high values are difficult to
control. Here, we report a reproducible fabrication of granular aluminium resonators
by developing a wireless ohmmeter, which allows in situ measurements during film
deposition and, therefore, control of the kinetic inductance of granular aluminium
films. Reproducible fabrication of circuits with impedances (inductances) exceeding
13 kΩ (1 nH per square) is now possible. By integrating a 7.9 kΩ resonator with
a germanium double quantum dot, we demonstrate strong charge-photon coupling with
a rate of gc/2π = 566 ± 2 MHz. This broadly applicable method opens the path for
novel qubits and high-fidelity, long-distance two-qubit gates.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: 'We acknowledge Franco De Palma, Mahya Khorramshahi, Fabian Oppliger,
Thomas Reisinger, Pasquale Scarlino and Xiao Xue for helpful discussions. We thank
Simon Robson for proofreading the manuscript. This research was supported by the
Scientific Service Units of ISTA through resources provided by the MIBA Machine
Shop and the Nanofabrication facility. This research and related results were made
possible with the support of the NOMIS Foundation and the HORIZON-RIA 101069515
project. This research was funded in whole or in part by the Austrian Science Fund
(FWF) https://doi.org/10.55776/P32235, https://doi.org/10.55776/I5060 and https://doi.org/10.55776/P36507.
For Open Access purposes, the author has applied a CC BY public copyright license
to any author accepted manuscript version arising from this submission. M.J. acknowledges
funding from FellowQUTE 2024-01. K.R. acknowledges funding from the European Union’s
Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant
Agreement No. 101034413. I.M.P. acknowledges funding from the Deutsche Forschungsgemeinschaft
(DFG - German Research Foundation) under project number 450396347 (GeHoldeQED).
ICN2 acknowledges funding from Generalitat de Catalunya 2021SGR00457. We acknowledge
support from CSIC Interdisciplinary Thematic Platform (PTI+) on Quantum Technologies
(PTI-QTEP+). This research work has been funded by the European Commission - NextGenerationEU
(Regulation EU 2020/2094), through CSIC’s Quantum Technologies Platform (QTEP).
ICN2 is supported by the Severo Ochoa programme from Spanish MCIN/AEI (Grant No.:
CEX2021-001214-S) and is funded by the CERCA Programme/Generalitat de Catalunya.
Part of the present work has been performed in the framework of Universitat Autònoma
de Barcelona Materials Science PhD programme. AGM has received funding from Grant
RYC2021-033479-I funded by MCIN/AEI/10.13039/501100011033 and by European Union
NextGenerationEU/PRTR. M.B. acknowledges support from SUR Generalitat de Catalunya
and the EU Social Fund; project ref. 2020 FI 00103. The authors acknowledge the
use of instrumentation and the technical advice provided by the Joint Electron Microscopy
Centre at ALBA (JEMCA). ICN2 acknowledges funding from Grant IU16-014206 (METCAM-FIB)
funded by the European Union through the European Regional Development Fund (ERDF),
with the support of the Ministry of Research and Universities, Generalitat de Catalunya.
ICN2 is a founding member of e-DREAM60.'
article_number: '2103'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Marian
full_name: Janik, Marian
id: 396A1950-F248-11E8-B48F-1D18A9856A87
last_name: Janik
orcid: 0009-0003-9037-8831
- first_name: Kevin Etienne Robert
full_name: Roux, Kevin Etienne Robert
id: 53f93ea2-803f-11ed-ab7e-b283135794ef
last_name: Roux
- first_name: Carla N
full_name: Borja Espinosa, Carla N
id: 18777c01-896a-11ed-bdf8-e4851dc07d16
last_name: Borja Espinosa
- first_name: Oliver
full_name: Sagi, Oliver
id: 71616374-A8E9-11E9-A7CA-09ECE5697425
last_name: Sagi
- first_name: Abdulhamid
full_name: Baghdadi, Abdulhamid
id: 160D87FA-96B5-11E9-BF77-7626E6697425
last_name: Baghdadi
- first_name: Thomas
full_name: Adletzberger, Thomas
id: 38756BB2-F248-11E8-B48F-1D18A9856A87
last_name: Adletzberger
- first_name: Stefano
full_name: Calcaterra, Stefano
last_name: Calcaterra
- first_name: Marc
full_name: Botifoll, Marc
last_name: Botifoll
- first_name: Alba
full_name: Garzón Manjón, Alba
last_name: Garzón Manjón
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Daniel
full_name: Chrastina, Daniel
last_name: Chrastina
- first_name: Giovanni
full_name: Isella, Giovanni
last_name: Isella
- first_name: Ioan M.
full_name: Pop, Ioan M.
last_name: Pop
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Janik M, Roux KER, Borja Espinosa CN, et al. Strong charge-photon coupling
in planar germanium enabled by granular aluminium superinductors. Nature Communications.
2025;16. doi:10.1038/s41467-025-57252-4
apa: Janik, M., Roux, K. E. R., Borja Espinosa, C. N., Sagi, O., Baghdadi, A., Adletzberger,
T., … Katsaros, G. (2025). Strong charge-photon coupling in planar germanium enabled
by granular aluminium superinductors. Nature Communications. Springer Nature.
https://doi.org/10.1038/s41467-025-57252-4
chicago: Janik, Marian, Kevin Etienne Robert Roux, Carla N Borja Espinosa, Oliver
Sagi, Abdulhamid Baghdadi, Thomas Adletzberger, Stefano Calcaterra, et al. “Strong
Charge-Photon Coupling in Planar Germanium Enabled by Granular Aluminium Superinductors.”
Nature Communications. Springer Nature, 2025. https://doi.org/10.1038/s41467-025-57252-4.
ieee: M. Janik et al., “Strong charge-photon coupling in planar germanium
enabled by granular aluminium superinductors,” Nature Communications, vol.
16. Springer Nature, 2025.
ista: Janik M, Roux KER, Borja Espinosa CN, Sagi O, Baghdadi A, Adletzberger T,
Calcaterra S, Botifoll M, Garzón Manjón A, Arbiol J, Chrastina D, Isella G, Pop
IM, Katsaros G. 2025. Strong charge-photon coupling in planar germanium enabled
by granular aluminium superinductors. Nature Communications. 16, 2103.
mla: Janik, Marian, et al. “Strong Charge-Photon Coupling in Planar Germanium Enabled
by Granular Aluminium Superinductors.” Nature Communications, vol. 16,
2103, Springer Nature, 2025, doi:10.1038/s41467-025-57252-4.
short: M. Janik, K.E.R. Roux, C.N. Borja Espinosa, O. Sagi, A. Baghdadi, T. Adletzberger,
S. Calcaterra, M. Botifoll, A. Garzón Manjón, J. Arbiol, D. Chrastina, G. Isella,
I.M. Pop, G. Katsaros, Nature Communications 16 (2025).
corr_author: '1'
date_created: 2025-03-16T23:01:23Z
date_published: 2025-03-01T00:00:00Z
date_updated: 2026-10-02T11:05:09Z
day: '01'
ddc:
- '530'
department:
- _id: GeKa
- _id: JoFi
- _id: M-Shop
doi: 10.1038/s41467-025-57252-4
ec_funded: 1
external_id:
arxiv:
- '2407.03079'
isi:
- '001434774800001'
pmid:
- '40025007'
file:
- access_level: open_access
checksum: a9383dd978ca2c50b7dded6c0bb2cd49
content_type: application/pdf
creator: dernst
date_created: 2025-03-17T10:53:32Z
date_updated: 2025-03-17T10:53:32Z
file_id: '19415'
file_name: 2025_NatureComm_Janik.pdf
file_size: 6364878
relation: main_file
success: 1
file_date_updated: 2025-03-17T10:53:32Z
fulldoi: https://doi.org/10.1038/s41467-025-57252-4
has_accepted_license: '1'
intvolume: ' 16'
isi: 1
language:
- iso: eng
month: '03'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 34c0acea-11ca-11ed-8bc3-8775e10fd452
grant_number: '101069515'
name: Integrated Germanium Quantum Technology
- _id: 237B3DA4-32DE-11EA-91FC-C7463DDC885E
call_identifier: FWF
grant_number: P32235
name: Towards scalable hut wire quantum devices
- _id: c0977eea-5a5b-11eb-8a69-a862db0cf4d1
grant_number: I05060
name: High impedance circuit quantum electrodynamics with hole spins
- _id: bd8bd29e-d553-11ed-ba76-f0070d4b237a
grant_number: P36507
name: Merging spin and superconducting qubits in planar Ge
- _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c
call_identifier: H2020
grant_number: '101034413'
name: 'IST-BRIDGE: International postdoctoral program'
- _id: 3AC91DDA-15DF-11EA-824D-93A3E7B544D1
call_identifier: FWF
name: FWF Open Access Fund
publication: Nature Communications
publication_identifier:
eissn:
- 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
record:
- id: '18886'
relation: research_data
status: public
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relation: earlier_version
status: public
scopus_import: '1'
status: public
title: Strong charge-photon coupling in planar germanium enabled by granular aluminium
superinductors
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 16
year: '2025'
...
---
APC_amount: 7068 EUR
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '19424'
abstract:
- lang: eng
text: "Hole spin qubits are rapidly emerging as the workhorse of semiconducting
quantum processors because of their large spin-orbit interaction, enabling fast
all-electric operations at low power. However, spin-orbit interaction also causes
non-uniformities in devices, resulting in locally varying qubit energies and site-dependent
anisotropies. While these anisotropies can be used to drive single-spins, if not
properly harnessed, they can hinder the path toward large-scale quantum processors.
Here, we report on microwave-driven singlet-triplet qubits in planar germanium
and use them to investigate the anisotropy of two spins in a double quantum dot.
We show two distinct operating regimes depending on the magnetic field direction.
For in-plane fields, the two spins are largely anisotropic, and electrically tunable,
which enables to measure all the available transitions; coherence times exceeding
3 $\\mu$s are extracted. For out-of-plane fields, they have an isotropic response
but preserve the substantial energy difference required to address the singlet-triplet
qubit. Even in this field direction, where the qubit lifetime\r\nis strongly affected
by nuclear spins, we find 400 ns coherence times. Our work adds a valuable tool
to investigate and harness the anisotropy of spin qubits and can be implemented
in any large-scale NxN device, facilitating the path towards scalable quantum
processors."
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: "We thank A. Crippa for helpful discussions. This research was supported
by the Scientific Service Units of ISTA through resources provided by the MIBA Machine
Shop and the Nanofabrication facility. This research and related results were made
possible with the support of the NOMIS Foundation, the HORIZON-RIA 101069515 project
and the FWF Projects with DOI:10.55776/F86 and DOI:10.55776/I5060. M.R.-R. acknowledges
support from the Netherlands Organization of Scientific Research (NWO) under Veni
grant VI.Veni.212.223. The\r\nResearch of S.B. and M.R.-R. was sponsored in part
by the Army Research Office and was accomplished under Award Number: W911NF-23-1-0110.
The views and conclusions contained in this document are those of the authors and
should not be interpreted as representing the official policies, either expressed
or implied, of the Army Research Office or the U.S. Government. The U.S. Government
is authorized to reproduce and distribute reprints for Government purposes notwithstanding
any copyright notation herein."
article_number: '3862'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Jaime
full_name: Saez Mollejo, Jaime
id: e0390f72-f6e0-11ea-865d-862393336714
last_name: Saez Mollejo
- first_name: Daniel
full_name: Jirovec, Daniel
id: 4C473F58-F248-11E8-B48F-1D18A9856A87
last_name: Jirovec
orcid: 0000-0002-7197-4801
- first_name: Yona A
full_name: Schell, Yona A
id: fe39122d-06bb-11ec-a33b-9e22b40e40a5
last_name: Schell
- first_name: Josip
full_name: Kukucka, Josip
id: 3F5D8856-F248-11E8-B48F-1D18A9856A87
last_name: Kukucka
- first_name: Stefano
full_name: Calcaterra, Stefano
last_name: Calcaterra
- first_name: Daniel
full_name: Chrastina, Daniel
last_name: Chrastina
- first_name: Giovanni
full_name: Isella, Giovanni
last_name: Isella
- first_name: Maximilian
full_name: Rimbach-Russ, Maximilian
last_name: Rimbach-Russ
- first_name: Stefano
full_name: Bosco, Stefano
last_name: Bosco
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Saez Mollejo J, Jirovec D, Schell YA, et al. Exchange anisotropies in microwave-driven
singlet-triplet qubits. Nature Communications. 2025;16. doi:10.1038/s41467-025-58969-y
apa: Saez Mollejo, J., Jirovec, D., Schell, Y. A., Kukucka, J., Calcaterra, S.,
Chrastina, D., … Katsaros, G. (2025). Exchange anisotropies in microwave-driven
singlet-triplet qubits. Nature Communications. Springer Nature. https://doi.org/10.1038/s41467-025-58969-y
chicago: Saez Mollejo, Jaime, Daniel Jirovec, Yona A Schell, Josip Kukucka, Stefano
Calcaterra, Daniel Chrastina, Giovanni Isella, Maximilian Rimbach-Russ, Stefano
Bosco, and Georgios Katsaros. “Exchange Anisotropies in Microwave-Driven Singlet-Triplet
Qubits.” Nature Communications. Springer Nature, 2025. https://doi.org/10.1038/s41467-025-58969-y.
ieee: J. Saez Mollejo et al., “Exchange anisotropies in microwave-driven
singlet-triplet qubits,” Nature Communications, vol. 16. Springer Nature,
2025.
ista: Saez Mollejo J, Jirovec D, Schell YA, Kukucka J, Calcaterra S, Chrastina D,
Isella G, Rimbach-Russ M, Bosco S, Katsaros G. 2025. Exchange anisotropies in
microwave-driven singlet-triplet qubits. Nature Communications. 16, 3862.
mla: Saez Mollejo, Jaime, et al. “Exchange Anisotropies in Microwave-Driven Singlet-Triplet
Qubits.” Nature Communications, vol. 16, 3862, Springer Nature, 2025, doi:10.1038/s41467-025-58969-y.
short: J. Saez Mollejo, D. Jirovec, Y.A. Schell, J. Kukucka, S. Calcaterra, D. Chrastina,
G. Isella, M. Rimbach-Russ, S. Bosco, G. Katsaros, Nature Communications 16 (2025).
corr_author: '1'
date_created: 2025-03-19T13:28:12Z
date_published: 2025-04-24T00:00:00Z
date_updated: 2026-10-20T22:31:01Z
day: '24'
ddc:
- '530'
department:
- _id: GeKa
doi: 10.1038/s41467-025-58969-y
external_id:
arxiv:
- '2408.03224'
isi:
- '001475587400022'
pmid:
- '40274808'
file:
- access_level: open_access
checksum: 13fe84cddc9d4e47213bf17acdac70d7
content_type: application/pdf
creator: dernst
date_created: 2025-05-05T07:08:23Z
date_updated: 2025-05-05T07:08:23Z
file_id: '19645'
file_name: 2025_NatureComm_SaezMollejo.pdf
file_size: 1548756
relation: main_file
success: 1
file_date_updated: 2025-05-05T07:08:23Z
fulldoi: https://doi.org/10.1038/s41467-025-58969-y
has_accepted_license: '1'
intvolume: ' 16'
isi: 1
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 34c0acea-11ca-11ed-8bc3-8775e10fd452
grant_number: '101069515'
name: Integrated Germanium Quantum Technology
- _id: 34a66131-11ca-11ed-8bc3-a31681c6b03e
grant_number: F8606
name: 'Center for Correlated Quantum Materials and Solid State Quantum Systems:
Conventional and unconventional topological superconductors'
- _id: c0977eea-5a5b-11eb-8a69-a862db0cf4d1
grant_number: I05060
name: High impedance circuit quantum electrodynamics with hole spins
- _id: 262116AA-B435-11E9-9278-68D0E5697425
name: Hybrid Semiconductor - Superconductor Quantum Devices
- _id: 3AC91DDA-15DF-11EA-824D-93A3E7B544D1
call_identifier: FWF
name: FWF Open Access Fund
publication: Nature Communications
publication_identifier:
eissn:
- 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
link:
- description: News on ISTA website
relation: research_data
url: https://ista.ac.at/en/news/the-shadow-of-an-electron/
record:
- id: '19409'
relation: research_data
status: public
- id: '19836'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Exchange anisotropies in microwave-driven singlet-triplet qubits
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 16
year: '2025'
...
---
APC_amount: 6468 EUR
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '14793'
abstract:
- lang: eng
text: Superconductor/semiconductor hybrid devices have attracted increasing interest
in the past years. Superconducting electronics aims to complement semiconductor
technology, while hybrid architectures are at the forefront of new ideas such
as topological superconductivity and protected qubits. In this work, we engineer
the induced superconductivity in two-dimensional germanium hole gas by varying
the distance between the quantum well and the aluminum. We demonstrate a hard
superconducting gap and realize an electrically and flux tunable superconducting
diode using a superconducting quantum interference device (SQUID). This allows
to tune the current phase relation (CPR), to a regime where single Cooper pair
tunneling is suppressed, creating a sin(2y) CPR. Shapiro experiments complement
this interpretation and the microwave drive allows to create a diode with ≈ 100%
efficiency. The reported results open up the path towards integration of spin
qubit devices, microwave resonators and (protected) superconducting qubits on the
same silicon technology compatible platform.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: "We acknowledge Alexander Brinkmann, Alessandro Crippa, Francesco
Giazotto, Andrew Higginbotham, Andrea Iorio, Giordano Scappucci, Christian Schonenberger,
and Lukas Splitthoff for helpful discussions. We thank Marcel Verheijen for the
support in the TEM analysis. This research and related results were made possible
with the support of the NOMIS\r\nFoundation. It was supported by the Scientific
Service Units of ISTA through resources provided by the MIBA Machine Shop and the
nanofabrication facility, the European Union’s Horizon 2020 research andinnovation
programme under Grant Agreement No 862046, the HORIZONRIA\r\n101069515 project,
the European Innovation Council Pathfinder grant no. 101115315 (QuKiT), and the
FWF Projects #P-32235, #P-36507 and #F-8606. For the purpose of open access, the
authors have applied a CC BY public copyright licence to any Author Accepted Manuscript
version arising from this submission. R.S.S. acknowledges Spanish CM “Talento Program\"\r\nProject
No. 2022-T1/IND-24070. J.J. acknowledges European Research Council TOCINA 834290."
article_number: '169'
article_processing_charge: Yes
article_type: original
author:
- first_name: Marco
full_name: Valentini, Marco
id: C0BB2FAC-D767-11E9-B658-BC13E6697425
last_name: Valentini
- first_name: Oliver
full_name: Sagi, Oliver
id: 71616374-A8E9-11E9-A7CA-09ECE5697425
last_name: Sagi
- first_name: Levon
full_name: Baghumyan, Levon
id: 7aa1f788-b527-11ee-aa9e-e6111a79e0c7
last_name: Baghumyan
- first_name: Thijs
full_name: de Gijsel, Thijs
id: a0ece13c-b527-11ee-929d-bad130106eee
last_name: de Gijsel
- first_name: Jason
full_name: Jung, Jason
id: 4C9ACE7A-F248-11E8-B48F-1D18A9856A87
last_name: Jung
- first_name: Stefano
full_name: Calcaterra, Stefano
last_name: Calcaterra
- first_name: Andrea
full_name: Ballabio, Andrea
last_name: Ballabio
- first_name: Juan L
full_name: Aguilera Servin, Juan L
id: 2A67C376-F248-11E8-B48F-1D18A9856A87
last_name: Aguilera Servin
orcid: 0000-0002-2862-8372
- first_name: Kushagra
full_name: Aggarwal, Kushagra
id: b22ab905-3539-11eb-84c3-fc159dcd79cb
last_name: Aggarwal
orcid: 0000-0001-9985-9293
- first_name: Marian
full_name: Janik, Marian
id: 396A1950-F248-11E8-B48F-1D18A9856A87
last_name: Janik
orcid: 0009-0003-9037-8831
- first_name: Thomas
full_name: Adletzberger, Thomas
id: 38756BB2-F248-11E8-B48F-1D18A9856A87
last_name: Adletzberger
- first_name: Rubén
full_name: Seoane Souto, Rubén
last_name: Seoane Souto
- first_name: Martin
full_name: Leijnse, Martin
last_name: Leijnse
- first_name: Jeroen
full_name: Danon, Jeroen
last_name: Danon
- first_name: Constantin
full_name: Schrade, Constantin
last_name: Schrade
- first_name: Erik
full_name: Bakkers, Erik
last_name: Bakkers
- first_name: Daniel
full_name: Chrastina, Daniel
last_name: Chrastina
- first_name: Giovanni
full_name: Isella, Giovanni
last_name: Isella
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Valentini M, Sagi O, Baghumyan L, et al. Parity-conserving Cooper-pair transport
and ideal superconducting diode in planar germanium. Nature Communications.
2024;15. doi:10.1038/s41467-023-44114-0
apa: Valentini, M., Sagi, O., Baghumyan, L., de Gijsel, T., Jung, J., Calcaterra,
S., … Katsaros, G. (2024). Parity-conserving Cooper-pair transport and ideal superconducting
diode in planar germanium. Nature Communications. Springer Nature. https://doi.org/10.1038/s41467-023-44114-0
chicago: Valentini, Marco, Oliver Sagi, Levon Baghumyan, Thijs de Gijsel, Jason
Jung, Stefano Calcaterra, Andrea Ballabio, et al. “Parity-Conserving Cooper-Pair
Transport and Ideal Superconducting Diode in Planar Germanium.” Nature Communications.
Springer Nature, 2024. https://doi.org/10.1038/s41467-023-44114-0.
ieee: M. Valentini et al., “Parity-conserving Cooper-pair transport and ideal
superconducting diode in planar germanium,” Nature Communications, vol.
15. Springer Nature, 2024.
ista: Valentini M, Sagi O, Baghumyan L, de Gijsel T, Jung J, Calcaterra S, Ballabio
A, Aguilera Servin JL, Aggarwal K, Janik M, Adletzberger T, Seoane Souto R, Leijnse
M, Danon J, Schrade C, Bakkers E, Chrastina D, Isella G, Katsaros G. 2024. Parity-conserving
Cooper-pair transport and ideal superconducting diode in planar germanium. Nature
Communications. 15, 169.
mla: Valentini, Marco, et al. “Parity-Conserving Cooper-Pair Transport and Ideal
Superconducting Diode in Planar Germanium.” Nature Communications, vol.
15, 169, Springer Nature, 2024, doi:10.1038/s41467-023-44114-0.
short: M. Valentini, O. Sagi, L. Baghumyan, T. de Gijsel, J. Jung, S. Calcaterra,
A. Ballabio, J.L. Aguilera Servin, K. Aggarwal, M. Janik, T. Adletzberger, R.
Seoane Souto, M. Leijnse, J. Danon, C. Schrade, E. Bakkers, D. Chrastina, G. Isella,
G. Katsaros, Nature Communications 15 (2024).
corr_author: '1'
das_tickbox: '1'
dataavailabilitystatement: All experimental data included in this work are available
at https://zenodo.org/records/10119346.
date_created: 2024-01-14T23:00:56Z
date_published: 2024-01-02T00:00:00Z
date_updated: 2026-10-02T10:23:53Z
day: '02'
ddc:
- '530'
department:
- _id: GeKa
doi: 10.1038/s41467-023-44114-0
ec_funded: 1
external_id:
isi:
- '001142794000839'
pmid:
- '38167818'
file:
- access_level: open_access
checksum: ef79173b45eeaf984ffa61ef2f8a52ab
content_type: application/pdf
creator: dernst
date_created: 2024-01-17T11:03:00Z
date_updated: 2024-01-17T11:03:00Z
file_id: '14825'
file_name: 2024_NatureComm_Valentini.pdf
file_size: 2336595
relation: main_file
success: 1
file_date_updated: 2024-01-17T11:03:00Z
fulldoi: https://doi.org/10.1038/s41467-023-44114-0
has_accepted_license: '1'
intvolume: ' 15'
isi: 1
language:
- iso: eng
month: '01'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 237E5020-32DE-11EA-91FC-C7463DDC885E
call_identifier: H2020
grant_number: '862046'
name: TOPOLOGICALLY PROTECTED AND SCALABLE QUANTUM BITS
- _id: 34c0acea-11ca-11ed-8bc3-8775e10fd452
grant_number: '101069515'
name: Integrated Germanium Quantum Technology
- _id: bdc2ca30-d553-11ed-ba76-cf164a5bb811
grant_number: '101115315'
name: Quantum bits with Kitaev Transmons
- _id: 237B3DA4-32DE-11EA-91FC-C7463DDC885E
call_identifier: FWF
grant_number: P32235
name: Towards scalable hut wire quantum devices
- _id: bd8bd29e-d553-11ed-ba76-f0070d4b237a
grant_number: P36507
name: Merging spin and superconducting qubits in planar Ge
- _id: 34a66131-11ca-11ed-8bc3-a31681c6b03e
grant_number: F8606
name: 'Center for Correlated Quantum Materials and Solid State Quantum Systems:
Conventional and unconventional topological superconductors'
- _id: 3AC91DDA-15DF-11EA-824D-93A3E7B544D1
call_identifier: FWF
name: FWF Open Access Fund
publication: Nature Communications
publication_identifier:
eissn:
- 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
record:
- id: '13312'
relation: earlier_version
status: public
- id: '23036'
relation: research_data
status: public
researchdata_availability: yes
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Parity-conserving Cooper-pair transport and ideal superconducting diode in
planar germanium
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 15
year: '2024'
...
---
DOAJ_listed: '1'
_id: '15320'
abstract:
- lang: eng
text: Josephson diodes are superconducting elements that show an asymmetry in the
critical current depending on the direction of the current. Here, we theoretically
explore how an alternating current bias can tune the response of such a diode.
We show that for slow driving there is always a regime where the system can only
carry zero-voltage dc current in one direction, thus effectively behaving as an
ideal Josephson diode. Under fast driving, the diode efficiency is also tunable,
although the ideal regime cannot be reached in this case. We also investigate
the residual dissipation due to the time-dependent current bias and show that
it remains small. All our conclusions are solely based on the critical current
asymmetry of the junction, and are thus compatible with any Josephson diode.
acknowledgement: "We acknowledge support from research grants Spanish CM Talento Program
(Project No. 2022-T1/IND-24070), Spanish Ministry of Science, innovation, and Universities
through Grant No. PID2022-140552NA-I00, Swedish Research Council under Grant Agreement
No. 2020-03412, the European Research Council (ERC) under the European Union’s Horizon
2020 research and innovation programme under Grant Agreement No. 856526, Nanolund,
FWF Project with [82],\r\nand Microsoft Corporation. "
article_number: L022002
article_processing_charge: Yes
article_type: letter_note
author:
- first_name: Rubén
full_name: Seoane Souto, Rubén
last_name: Seoane Souto
- first_name: Martin
full_name: Leijnse, Martin
last_name: Leijnse
- first_name: Constantin
full_name: Schrade, Constantin
last_name: Schrade
- first_name: Marco
full_name: Valentini, Marco
id: C0BB2FAC-D767-11E9-B658-BC13E6697425
last_name: Valentini
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
- first_name: Jeroen
full_name: Danon, Jeroen
last_name: Danon
citation:
ama: Seoane Souto R, Leijnse M, Schrade C, Valentini M, Katsaros G, Danon J. Tuning
the Josephson diode response with an ac current. Physical Review Research.
2024;6(2). doi:10.1103/PhysRevResearch.6.L022002
apa: Seoane Souto, R., Leijnse, M., Schrade, C., Valentini, M., Katsaros, G., &
Danon, J. (2024). Tuning the Josephson diode response with an ac current. Physical
Review Research. American Physical Society. https://doi.org/10.1103/PhysRevResearch.6.L022002
chicago: Seoane Souto, Rubén, Martin Leijnse, Constantin Schrade, Marco Valentini,
Georgios Katsaros, and Jeroen Danon. “Tuning the Josephson Diode Response with
an Ac Current.” Physical Review Research. American Physical Society, 2024.
https://doi.org/10.1103/PhysRevResearch.6.L022002.
ieee: R. Seoane Souto, M. Leijnse, C. Schrade, M. Valentini, G. Katsaros, and J.
Danon, “Tuning the Josephson diode response with an ac current,” Physical Review
Research, vol. 6, no. 2. American Physical Society, 2024.
ista: Seoane Souto R, Leijnse M, Schrade C, Valentini M, Katsaros G, Danon J. 2024.
Tuning the Josephson diode response with an ac current. Physical Review Research.
6(2), L022002.
mla: Seoane Souto, Rubén, et al. “Tuning the Josephson Diode Response with an Ac
Current.” Physical Review Research, vol. 6, no. 2, L022002, American Physical
Society, 2024, doi:10.1103/PhysRevResearch.6.L022002.
short: R. Seoane Souto, M. Leijnse, C. Schrade, M. Valentini, G. Katsaros, J. Danon,
Physical Review Research 6 (2024).
das_tickbox: '0'
date_created: 2024-04-14T22:01:02Z
date_published: 2024-04-01T00:00:00Z
date_updated: 2026-10-02T10:26:37Z
day: '01'
ddc:
- '530'
department:
- _id: GeKa
doi: 10.1103/PhysRevResearch.6.L022002
file:
- access_level: open_access
checksum: 7b9cb3b17d89f392bd582e30d7a72a29
content_type: application/pdf
creator: dernst
date_created: 2024-04-17T07:14:53Z
date_updated: 2024-04-17T07:14:53Z
file_id: '15327'
file_name: 2024_PhysReviewResearch_Souto.pdf
file_size: 1073544
relation: main_file
success: 1
file_date_updated: 2024-04-17T07:14:53Z
fulldoi: https://doi.org/10.1103/PhysRevResearch.6.L022002
has_accepted_license: '1'
intvolume: ' 6'
issue: '2'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
publication: Physical Review Research
publication_identifier:
eissn:
- 2643-1564
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Tuning the Josephson diode response with an ac current
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 6
year: '2024'
...
---
_id: '17389'
abstract:
- lang: eng
text: The potential of Si and SiGe-based devices for the scaling of quantum circuits
is tainted by device variability. Each device needs to be tuned to operation conditions
and each device realisation requires a different tuning protocol. We demonstrate
that it is possible to automate the tuning of a 4-gate Si FinFET, a 5-gate GeSi
nanowire and a 7-gate Ge/SiGe heterostructure double quantum dot device from scratch
with the same algorithm. We achieve tuning times of 30, 10, and 92 min, respectively.
The algorithm also provides insight into the parameter space landscape for each
of these devices, allowing for the characterization of the regions where double
quantum dot regimes are found. These results show that overarching solutions for
the tuning of quantum devices are enabled by machine learning.
acknowledged_ssus:
- _id: NanoFab
acknowledgement: We acknowledge Ang Li, Erik P. A. M. Bakkers (University of Eindhoven)
for the fabrication of the Ge/Si nanowire. This work was supported by the Royal
Society, the EPSRC National Quantum Technology Hub in Networked Quantum Information
Technology (EP/M013243/1), Quantum Technology Capital (EP/N014995/1), EPSRC Platform
Grant (EP/R029229/1), the European Research Council (Grant agreement 948932), the
Swiss Nanoscience Institute, the NCCR SPIN, the EU H2020 European Microkelvin Platform
EMP grant No. 824109, the Scientific Service Units of IST Austria through resources
provided by the nanofabrication facility, the FWF-I 05060 and the FWF-P 30207 project.
article_number: '17281'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: B.
full_name: Severin, B.
last_name: Severin
- first_name: D. T.
full_name: Lennon, D. T.
last_name: Lennon
- first_name: L. C.
full_name: Camenzind, L. C.
last_name: Camenzind
- first_name: F.
full_name: Vigneau, F.
last_name: Vigneau
- first_name: F.
full_name: Fedele, F.
last_name: Fedele
- first_name: Daniel
full_name: Jirovec, Daniel
id: 4C473F58-F248-11E8-B48F-1D18A9856A87
last_name: Jirovec
orcid: 0000-0002-7197-4801
- first_name: A.
full_name: Ballabio, A.
last_name: Ballabio
- first_name: D.
full_name: Chrastina, D.
last_name: Chrastina
- first_name: G.
full_name: Isella, G.
last_name: Isella
- first_name: M.
full_name: de Kruijf, M.
last_name: de Kruijf
- first_name: M. J.
full_name: Carballido, M. J.
last_name: Carballido
- first_name: S.
full_name: Svab, S.
last_name: Svab
- first_name: A. V.
full_name: Kuhlmann, A. V.
last_name: Kuhlmann
- first_name: S.
full_name: Geyer, S.
last_name: Geyer
- first_name: F. N. M.
full_name: Froning, F. N. M.
last_name: Froning
- first_name: H.
full_name: Moon, H.
last_name: Moon
- first_name: M. A.
full_name: Osborne, M. A.
last_name: Osborne
- first_name: D.
full_name: Sejdinovic, D.
last_name: Sejdinovic
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
- first_name: D. M.
full_name: Zumbühl, D. M.
last_name: Zumbühl
- first_name: G. A. D.
full_name: Briggs, G. A. D.
last_name: Briggs
- first_name: N.
full_name: Ares, N.
last_name: Ares
citation:
ama: Severin B, Lennon DT, Camenzind LC, et al. Cross-architecture tuning of silicon
and SiGe-based quantum devices using machine learning. Scientific Reports.
2024;14. doi:10.1038/s41598-024-67787-z
apa: Severin, B., Lennon, D. T., Camenzind, L. C., Vigneau, F., Fedele, F., Jirovec,
D., … Ares, N. (2024). Cross-architecture tuning of silicon and SiGe-based quantum
devices using machine learning. Scientific Reports. Springer Nature. https://doi.org/10.1038/s41598-024-67787-z
chicago: Severin, B., D. T. Lennon, L. C. Camenzind, F. Vigneau, F. Fedele, Daniel
Jirovec, A. Ballabio, et al. “Cross-Architecture Tuning of Silicon and SiGe-Based
Quantum Devices Using Machine Learning.” Scientific Reports. Springer Nature,
2024. https://doi.org/10.1038/s41598-024-67787-z.
ieee: B. Severin et al., “Cross-architecture tuning of silicon and SiGe-based
quantum devices using machine learning,” Scientific Reports, vol. 14. Springer
Nature, 2024.
ista: Severin B, Lennon DT, Camenzind LC, Vigneau F, Fedele F, Jirovec D, Ballabio
A, Chrastina D, Isella G, de Kruijf M, Carballido MJ, Svab S, Kuhlmann AV, Geyer
S, Froning FNM, Moon H, Osborne MA, Sejdinovic D, Katsaros G, Zumbühl DM, Briggs
GAD, Ares N. 2024. Cross-architecture tuning of silicon and SiGe-based quantum
devices using machine learning. Scientific Reports. 14, 17281.
mla: Severin, B., et al. “Cross-Architecture Tuning of Silicon and SiGe-Based Quantum
Devices Using Machine Learning.” Scientific Reports, vol. 14, 17281, Springer
Nature, 2024, doi:10.1038/s41598-024-67787-z.
short: B. Severin, D.T. Lennon, L.C. Camenzind, F. Vigneau, F. Fedele, D. Jirovec,
A. Ballabio, D. Chrastina, G. Isella, M. de Kruijf, M.J. Carballido, S. Svab,
A.V. Kuhlmann, S. Geyer, F.N.M. Froning, H. Moon, M.A. Osborne, D. Sejdinovic,
G. Katsaros, D.M. Zumbühl, G.A.D. Briggs, N. Ares, Scientific Reports 14 (2024).
das_tickbox: '1'
dataavailabilitystatement: The data acquired by the algorithm during experiments is
available from the corresponding author upon reasonable request.
date_created: 2024-08-05T08:50:51Z
date_published: 2024-07-27T00:00:00Z
date_updated: 2026-10-02T11:04:33Z
day: '27'
ddc:
- '530'
department:
- _id: GeKa
doi: 10.1038/s41598-024-67787-z
external_id:
arxiv:
- '2107.12975'
isi:
- '001281273100062'
pmid:
- '39068242'
file:
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checksum: 0b34b89e5f4f3f7b32ffadf104394594
content_type: application/pdf
creator: dernst
date_created: 2024-08-05T08:52:14Z
date_updated: 2024-08-05T08:52:14Z
file_id: '17390'
file_name: 2024_ScientificReports_Severin.pdf
file_size: 2255741
relation: main_file
success: 1
file_date_updated: 2024-08-05T08:52:14Z
fulldoi: https://doi.org/10.1038/s41598-024-67787-z
has_accepted_license: '1'
intvolume: ' 14'
isi: 1
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: c0977eea-5a5b-11eb-8a69-a862db0cf4d1
grant_number: I05060
name: High impedance circuit quantum electrodynamics with hole spins
- _id: 2641CE5E-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P30207
name: Hole spin orbit qubits in Ge quantum wells
publication: Scientific Reports
publication_identifier:
issn:
- 2045-2322
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
record:
- id: '10066'
relation: earlier_version
status: public
researchdata_availability: upon request
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Cross-architecture tuning of silicon and SiGe-based quantum devices using machine
learning
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 14
year: '2024'
...
---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '18602'
abstract:
- lang: eng
text: Semiconductor quantum dots (QDs) in planar germanium (Ge) heterostructures
have emerged as front-runners for future hole-based quantum processors. Here,
we present strong coupling between a hole charge qubit, defined in a double quantum
dot (DQD) in planar Ge, and microwave photons in a high-impedance (Zr = 1.3 kΩ)
resonator based on an array of superconducting quantum interference devices (SQUIDs).
Our investigation reveals vacuum-Rabi splittings with coupling strengths up to
g0/2π = 260 MHz, and a cooperativity of C ~ 100, dependent on DQD tuning. Furthermore,
utilizing the frequency tunability of our resonator, we explore the quenched energy
splitting associated with strong Coulomb correlation effects in Ge QDs. The observed
enhanced coherence of the strongly correlated excited state signals the presence
of distinct symmetries within related spin functions, serving as a precursor to
the strong coupling between photons and spin-charge hybrid qubits in planar Ge.
This work paves the way towards coherent quantum connections between remote hole
qubits in planar Ge, required to scale up hole-based quantum processors.
acknowledgement: The authors thank Simone Frasca, Vincent Jouanny, Guillaume Beaulieu,
Camille Roy, Dominic Dahinden, Davide Lombardo, Daniel Chrastina, and Siddhart Gautam
for contributing to some cleanroom fabrication steps, the measurement setup, device
simulations, data analysis, and for the useful discussions. P.S. acknowledges support
from the Swiss National Science Foundation (SNSF) through the grants Ref. No. 200021
200418 and Ref. No. 206021_205335, and from the Swiss State Secretariat for Education,
Research and Innovation (SERI) under contract number 01042765 SEFRI MB22.00081.
W.J. acknowledges support from the EPFL QSE Postdoctoral Fellowship Grant. S.B.,
D.L., and P.S. acknowledge support from the NCCR Spin Qubit in Silicon (NCCR-SPIN)
Grant No. 51NF40-180604. M.J., G.K., G.I., and S.C. acknowledge support from the
Horizon Europe Project IGNITE ID 101070193. G.K. acknowledges support from the FWF
via the P32235 and I05060 projects.
article_number: '10177'
article_processing_charge: Yes
article_type: original
author:
- first_name: Franco
full_name: De Palma, Franco
last_name: De Palma
- first_name: Fabian
full_name: Oppliger, Fabian
last_name: Oppliger
- first_name: Wonjin
full_name: Jang, Wonjin
last_name: Jang
- first_name: Stefano
full_name: Bosco, Stefano
last_name: Bosco
- first_name: Marian
full_name: Janik, Marian
id: 396A1950-F248-11E8-B48F-1D18A9856A87
last_name: Janik
orcid: 0009-0003-9037-8831
- first_name: Stefano
full_name: Calcaterra, Stefano
last_name: Calcaterra
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
- first_name: Giovanni
full_name: Isella, Giovanni
last_name: Isella
- first_name: Daniel
full_name: Loss, Daniel
last_name: Loss
- first_name: Pasquale
full_name: Scarlino, Pasquale
last_name: Scarlino
citation:
ama: De Palma F, Oppliger F, Jang W, et al. Strong hole-photon coupling in planar
Ge for probing charge degree and strongly correlated states. Nature Communications.
2024;15. doi:10.1038/s41467-024-54520-7
apa: De Palma, F., Oppliger, F., Jang, W., Bosco, S., Janik, M., Calcaterra, S.,
… Scarlino, P. (2024). Strong hole-photon coupling in planar Ge for probing charge
degree and strongly correlated states. Nature Communications. Springer
Nature. https://doi.org/10.1038/s41467-024-54520-7
chicago: De Palma, Franco, Fabian Oppliger, Wonjin Jang, Stefano Bosco, Marian Janik,
Stefano Calcaterra, Georgios Katsaros, Giovanni Isella, Daniel Loss, and Pasquale
Scarlino. “Strong Hole-Photon Coupling in Planar Ge for Probing Charge Degree
and Strongly Correlated States.” Nature Communications. Springer Nature,
2024. https://doi.org/10.1038/s41467-024-54520-7.
ieee: F. De Palma et al., “Strong hole-photon coupling in planar Ge for probing
charge degree and strongly correlated states,” Nature Communications, vol.
15. Springer Nature, 2024.
ista: De Palma F, Oppliger F, Jang W, Bosco S, Janik M, Calcaterra S, Katsaros G,
Isella G, Loss D, Scarlino P. 2024. Strong hole-photon coupling in planar Ge for
probing charge degree and strongly correlated states. Nature Communications. 15,
10177.
mla: De Palma, Franco, et al. “Strong Hole-Photon Coupling in Planar Ge for Probing
Charge Degree and Strongly Correlated States.” Nature Communications, vol.
15, 10177, Springer Nature, 2024, doi:10.1038/s41467-024-54520-7.
short: F. De Palma, F. Oppliger, W. Jang, S. Bosco, M. Janik, S. Calcaterra, G.
Katsaros, G. Isella, D. Loss, P. Scarlino, Nature Communications 15 (2024).
das_tickbox: '1'
dataavailabilitystatement: The datasets generated during the current study are available
in Zenodo with the identifier https://doi.org/10.5281/zenodo.13935167.
date_created: 2024-12-01T23:01:53Z
date_published: 2024-12-01T00:00:00Z
date_updated: 2026-10-02T11:02:23Z
day: '01'
ddc:
- '530'
department:
- _id: GeKa
doi: 10.1038/s41467-024-54520-7
external_id:
isi:
- '001362684200001'
pmid:
- '39580488'
file:
- access_level: open_access
checksum: ef9f99a84089c388904cc8aa8d89c55a
content_type: application/pdf
creator: dernst
date_created: 2024-12-03T11:00:15Z
date_updated: 2024-12-03T11:00:15Z
file_id: '18611'
file_name: 2024_NatureComm_dePalma.pdf
file_size: 5288092
relation: main_file
success: 1
file_date_updated: 2024-12-03T11:00:15Z
fulldoi: https://doi.org/10.1038/s41467-024-54520-7
has_accepted_license: '1'
intvolume: ' 15'
isi: 1
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 237B3DA4-32DE-11EA-91FC-C7463DDC885E
call_identifier: FWF
grant_number: P32235
name: Towards scalable hut wire quantum devices
- _id: c0977eea-5a5b-11eb-8a69-a862db0cf4d1
grant_number: I05060
name: High impedance circuit quantum electrodynamics with hole spins
publication: Nature Communications
publication_identifier:
eissn:
- 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
record:
- id: '23037'
relation: research_data
status: public
researchdata_availability: yes
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Strong hole-photon coupling in planar Ge for probing charge degree and strongly
correlated states
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 15
year: '2024'
...
---
OA_place: publisher
OA_type: hybrid
_id: '18653'
abstract:
- lang: eng
text: Charge sensing is a sensitive technique for probing quantum devices, of particular
importance for spin-qubit readout. To achieve good readout sensitivities, the
proximity of the charge sensor to the device to be measured is a necessity. However,
this proximity also means that the operation of the device affects, in turn, the
sensor tuning and ultimately the readout sensitivity. We present an approach for
compensating for this crosstalk effect allowing for the gate voltages of the measured
device to be swept in a 1-V × 1-V window while maintaining a sensor configuration
chosen by a Bayesian optimizer. Our algorithm will hopefully be a major contribution
to the suite of fully automated solutions required for the operation of large
quantum device architectures.
acknowledged_ssus:
- _id: NanoFab
acknowledgement: We thank Nicholas Sim for providing help with the experiment and
Sebastian Orbell for helpful discussions. This work was supported by the Royal Society,
the Engineering and Physical Sciences Research Council (EPSRC) National Quantum
Technology Hub in Networked Quantum Information Technology (Grant No. EP/M013243/1),
Quantum Technology Capital (Grant No. EP/N014995/1), the EPSRC Platform Grant (Grant
No. EP/R029229/1), the European Research Council (Grant Agreement No. 948932), the
Scientific Service Units of the Institute of Science and Technology Austria through
resources provided by the nanofabrication facility and, the FWF-I 05060 and HORIZON-RIA
101069515 projects.
article_number: '064026'
article_processing_charge: No
article_type: original
author:
- first_name: Joseph
full_name: Hickie, Joseph
last_name: Hickie
- first_name: Barnaby
full_name: Van Straaten, Barnaby
last_name: Van Straaten
- first_name: Federico
full_name: Fedele, Federico
last_name: Fedele
- first_name: Daniel
full_name: Jirovec, Daniel
id: 4C473F58-F248-11E8-B48F-1D18A9856A87
last_name: Jirovec
orcid: 0000-0002-7197-4801
- first_name: Andrea
full_name: Ballabio, Andrea
last_name: Ballabio
- first_name: Daniel
full_name: Chrastina, Daniel
last_name: Chrastina
- first_name: Giovanni
full_name: Isella, Giovanni
last_name: Isella
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
- first_name: Natalia
full_name: Ares, Natalia
last_name: Ares
citation:
ama: Hickie J, Van Straaten B, Fedele F, et al. Automated long-range compensation
of an rf quantum dot sensor. Physical Review Applied. 2024;22(6). doi:10.1103/PhysRevApplied.22.064026
apa: Hickie, J., Van Straaten, B., Fedele, F., Jirovec, D., Ballabio, A., Chrastina,
D., … Ares, N. (2024). Automated long-range compensation of an rf quantum dot
sensor. Physical Review Applied. American Physical Society. https://doi.org/10.1103/PhysRevApplied.22.064026
chicago: Hickie, Joseph, Barnaby Van Straaten, Federico Fedele, Daniel Jirovec,
Andrea Ballabio, Daniel Chrastina, Giovanni Isella, Georgios Katsaros, and Natalia
Ares. “Automated Long-Range Compensation of an Rf Quantum Dot Sensor.” Physical
Review Applied. American Physical Society, 2024. https://doi.org/10.1103/PhysRevApplied.22.064026.
ieee: J. Hickie et al., “Automated long-range compensation of an rf quantum
dot sensor,” Physical Review Applied, vol. 22, no. 6. American Physical
Society, 2024.
ista: Hickie J, Van Straaten B, Fedele F, Jirovec D, Ballabio A, Chrastina D, Isella
G, Katsaros G, Ares N. 2024. Automated long-range compensation of an rf quantum
dot sensor. Physical Review Applied. 22(6), 064026.
mla: Hickie, Joseph, et al. “Automated Long-Range Compensation of an Rf Quantum
Dot Sensor.” Physical Review Applied, vol. 22, no. 6, 064026, American
Physical Society, 2024, doi:10.1103/PhysRevApplied.22.064026.
short: J. Hickie, B. Van Straaten, F. Fedele, D. Jirovec, A. Ballabio, D. Chrastina,
G. Isella, G. Katsaros, N. Ares, Physical Review Applied 22 (2024).
das_tickbox: '0'
date_created: 2024-12-15T23:01:50Z
date_published: 2024-12-01T00:00:00Z
date_updated: 2026-10-02T11:04:04Z
day: '01'
ddc:
- '530'
department:
- _id: GeKa
doi: 10.1103/PhysRevApplied.22.064026
external_id:
isi:
- '001379155900003'
file:
- access_level: open_access
checksum: bc29a40819abc4969867b6cd6563f7ad
content_type: application/pdf
creator: dernst
date_created: 2024-12-16T11:13:48Z
date_updated: 2024-12-16T11:13:48Z
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fulldoi: https://doi.org/10.1103/PhysRevApplied.22.064026
has_accepted_license: '1'
intvolume: ' 22'
isi: 1
issue: '6'
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
project:
- _id: c0977eea-5a5b-11eb-8a69-a862db0cf4d1
grant_number: I05060
name: High impedance circuit quantum electrodynamics with hole spins
- _id: 34c0acea-11ca-11ed-8bc3-8775e10fd452
grant_number: '101069515'
name: Integrated Germanium Quantum Technology
publication: Physical Review Applied
publication_identifier:
eissn:
- 2331-7019
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Automated long-range compensation of an rf quantum dot sensor
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 22
year: '2024'
...
---
OA_place: publisher
OA_type: hybrid
_id: '15018'
abstract:
- lang: eng
text: The epitaxial growth of a strained Ge layer, which is a promising candidate
for the channel material of a hole spin qubit, has been demonstrated on 300 mm
Si wafers using commercially available Si0.3Ge0.7 strain relaxed buffer (SRB)
layers. The assessment of the layer and the interface qualities for a buried strained
Ge layer embedded in Si0.3Ge0.7 layers is reported. The XRD reciprocal space mapping
confirmed that the reduction of the growth temperature enables the 2-dimensional
growth of the Ge layer fully strained with respect to the Si0.3Ge0.7. Nevertheless,
dislocations at the top and/or bottom interface of the Ge layer were observed
by means of electron channeling contrast imaging, suggesting the importance of
the careful dislocation assessment. The interface abruptness does not depend on
the selection of the precursor gases, but it is strongly influenced by the growth
temperature which affects the coverage of the surface H-passivation. The mobility
of 2.7 × 105 cm2/Vs is promising, while the low percolation density of 3 × 1010
/cm2 measured with a Hall-bar device at 7 K illustrates the high quality of the
heterostructure thanks to the high Si0.3Ge0.7 SRB quality.
acknowledgement: The Ge project received funding from the European Union's Horizon
Europe programme under the Grant Agreement 101069515 – IGNITE. Siltronic AG is acknowledged
for providing the SRB wafers. This work was supported by Imec's Industrial Affiliation
Program on Quantum Computing.
article_number: '108231'
article_processing_charge: Yes (in subscription journal)
article_type: original
author:
- first_name: Yosuke
full_name: Shimura, Yosuke
last_name: Shimura
- first_name: Clement
full_name: Godfrin, Clement
last_name: Godfrin
- first_name: Andriy
full_name: Hikavyy, Andriy
last_name: Hikavyy
- first_name: Roy
full_name: Li, Roy
last_name: Li
- first_name: Juan L
full_name: Aguilera Servin, Juan L
id: 2A67C376-F248-11E8-B48F-1D18A9856A87
last_name: Aguilera Servin
orcid: 0000-0002-2862-8372
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
- first_name: Paola
full_name: Favia, Paola
last_name: Favia
- first_name: Han
full_name: Han, Han
last_name: Han
- first_name: Danny
full_name: Wan, Danny
last_name: Wan
- first_name: Kristiaan
full_name: de Greve, Kristiaan
last_name: de Greve
- first_name: Roger
full_name: Loo, Roger
last_name: Loo
citation:
ama: Shimura Y, Godfrin C, Hikavyy A, et al. Compressively strained epitaxial Ge
layers for quantum computing applications. Materials Science in Semiconductor
Processing. 2024;174(5). doi:10.1016/j.mssp.2024.108231
apa: Shimura, Y., Godfrin, C., Hikavyy, A., Li, R., Aguilera Servin, J. L., Katsaros,
G., … Loo, R. (2024). Compressively strained epitaxial Ge layers for quantum computing
applications. Materials Science in Semiconductor Processing. Elsevier.
https://doi.org/10.1016/j.mssp.2024.108231
chicago: Shimura, Yosuke, Clement Godfrin, Andriy Hikavyy, Roy Li, Juan L Aguilera
Servin, Georgios Katsaros, Paola Favia, et al. “Compressively Strained Epitaxial
Ge Layers for Quantum Computing Applications.” Materials Science in Semiconductor
Processing. Elsevier, 2024. https://doi.org/10.1016/j.mssp.2024.108231.
ieee: Y. Shimura et al., “Compressively strained epitaxial Ge layers for
quantum computing applications,” Materials Science in Semiconductor Processing,
vol. 174, no. 5. Elsevier, 2024.
ista: Shimura Y, Godfrin C, Hikavyy A, Li R, Aguilera Servin JL, Katsaros G, Favia
P, Han H, Wan D, de Greve K, Loo R. 2024. Compressively strained epitaxial Ge
layers for quantum computing applications. Materials Science in Semiconductor
Processing. 174(5), 108231.
mla: Shimura, Yosuke, et al. “Compressively Strained Epitaxial Ge Layers for Quantum
Computing Applications.” Materials Science in Semiconductor Processing,
vol. 174, no. 5, 108231, Elsevier, 2024, doi:10.1016/j.mssp.2024.108231.
short: Y. Shimura, C. Godfrin, A. Hikavyy, R. Li, J.L. Aguilera Servin, G. Katsaros,
P. Favia, H. Han, D. Wan, K. de Greve, R. Loo, Materials Science in Semiconductor
Processing 174 (2024).
das_tickbox: '1'
dataavailabilitystatement: No data was used for the research described in the article.
date_created: 2024-02-22T14:10:40Z
date_published: 2024-05-20T00:00:00Z
date_updated: 2026-10-02T11:06:21Z
day: '20'
ddc:
- '530'
department:
- _id: GeKa
- _id: NanoFab
doi: 10.1016/j.mssp.2024.108231
external_id:
isi:
- '001188520000001'
file:
- access_level: open_access
checksum: 62e8e9ae960387a3dca32ec7f5e413ab
content_type: application/pdf
creator: dernst
date_created: 2024-07-22T11:56:08Z
date_updated: 2024-07-22T11:56:08Z
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file_date_updated: 2024-07-22T11:56:08Z
fulldoi: https://doi.org/10.1016/j.mssp.2024.108231
has_accepted_license: '1'
intvolume: ' 174'
isi: 1
issue: '5'
keyword:
- Mechanical Engineering
- Mechanics of Materials
- Condensed Matter Physics
- General Materials Science
language:
- iso: eng
month: '05'
oa: 1
oa_version: Published Version
project:
- _id: 34c0acea-11ca-11ed-8bc3-8775e10fd452
grant_number: '101069515'
name: Integrated Germanium Quantum Technology
publication: Materials Science in Semiconductor Processing
publication_identifier:
issn:
- 1369-8001
publication_status: published
publisher: Elsevier
quality_controlled: '1'
researchdata_availability: not applicable
scopus_import: '1'
status: public
supplementarymaterial: no
title: Compressively strained epitaxial Ge layers for quantum computing applications
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 174
year: '2024'
...
---
APC_amount: 6828 EUR
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '17202'
abstract:
- lang: eng
text: Gate-tunable transmons (gatemons) employing semiconductor Josephson junctions
have recently emerged as building blocks for hybrid quantum circuits. In this
study, we present a gatemon fabricated in planar Germanium. We induce superconductivity
in a two-dimensional hole gas by evaporating aluminum atop a thin spacer, which
separates the superconductor from the Ge quantum well. The Josephson junction
is then integrated into an Xmon circuit and capacitively coupled to a transmission
line resonator. We showcase the qubit tunability in a broad frequency range with
resonator and two-tone spectroscopy. Time-domain characterizations reveal energy
relaxation and coherence times up to 75 ns. Our results, combined with the recent
advances in the spin qubit field, pave the way towards novel hybrid and protected
qubits in a group IV, CMOS-compatible material.
acknowledged_ssus:
- _id: ScienComp
- _id: M-Shop
- _id: NanoFab
acknowledgement: "We acknowledge Lucas Casparis, Jeroen Danon, Valla Fatemi, Morten
Kjaergard and Javad Shabani for their valuable insights and comments. This research
was supported by the Scientific Service Units of ISTA through resources provided
by the MIBA Machine Shop\r\nand the Nanofabrication facility. This research and
related results were made possible with the support of the NOMIS Foundation and
the FWF Projects with DOI:10.55776/I5060 and DOI:10.55776/P36507. We also acknowledge
the NextGenerationEU PRIN project\r\n2022A8CJP3 (GAMESQUAD) for partial financial
support."
article_number: '6400'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Oliver
full_name: Sagi, Oliver
id: 71616374-A8E9-11E9-A7CA-09ECE5697425
last_name: Sagi
- first_name: Alessandro
full_name: Crippa, Alessandro
id: 1F2B21A2-F6E7-11E9-9B82-F7DBE5697425
last_name: Crippa
orcid: 0000-0002-2968-611X
- first_name: Marco
full_name: Valentini, Marco
id: C0BB2FAC-D767-11E9-B658-BC13E6697425
last_name: Valentini
- first_name: Marian
full_name: Janik, Marian
id: 396A1950-F248-11E8-B48F-1D18A9856A87
last_name: Janik
orcid: 0009-0003-9037-8831
- first_name: Levon
full_name: Baghumyan, Levon
id: 7aa1f788-b527-11ee-aa9e-e6111a79e0c7
last_name: Baghumyan
- first_name: Giorgio
full_name: Fabris, Giorgio
id: 298cf6f3-1ff6-11ee-9fa6-d94cfa0b3352
last_name: Fabris
- first_name: Lucky
full_name: Kapoor, Lucky
id: 84b9700b-15b2-11ec-abd3-831089e67615
last_name: Kapoor
orcid: 0000-0001-8319-2148
- first_name: Farid
full_name: Hassani, Farid
id: 2AED110C-F248-11E8-B48F-1D18A9856A87
last_name: Hassani
orcid: 0000-0001-6937-5773
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
- first_name: Stefano
full_name: Calcaterra, Stefano
last_name: Calcaterra
- first_name: Daniel
full_name: Chrastina, Daniel
last_name: Chrastina
- first_name: Giovanni
full_name: Isella, Giovanni
last_name: Isella
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Sagi O, Crippa A, Valentini M, et al. A gate tunable transmon qubit in planar
Ge. Nature Communications. 2024;15. doi:10.1038/s41467-024-50763-6
apa: Sagi, O., Crippa, A., Valentini, M., Janik, M., Baghumyan, L., Fabris, G.,
… Katsaros, G. (2024). A gate tunable transmon qubit in planar Ge. Nature Communications.
Springer Nature. https://doi.org/10.1038/s41467-024-50763-6
chicago: Sagi, Oliver, Alessandro Crippa, Marco Valentini, Marian Janik, Levon Baghumyan,
Giorgio Fabris, Lucky Kapoor, et al. “A Gate Tunable Transmon Qubit in Planar
Ge.” Nature Communications. Springer Nature, 2024. https://doi.org/10.1038/s41467-024-50763-6.
ieee: O. Sagi et al., “A gate tunable transmon qubit in planar Ge,” Nature
Communications, vol. 15. Springer Nature, 2024.
ista: Sagi O, Crippa A, Valentini M, Janik M, Baghumyan L, Fabris G, Kapoor L, Hassani
F, Fink JM, Calcaterra S, Chrastina D, Isella G, Katsaros G. 2024. A gate tunable
transmon qubit in planar Ge. Nature Communications. 15, 6400.
mla: Sagi, Oliver, et al. “A Gate Tunable Transmon Qubit in Planar Ge.” Nature
Communications, vol. 15, 6400, Springer Nature, 2024, doi:10.1038/s41467-024-50763-6.
short: O. Sagi, A. Crippa, M. Valentini, M. Janik, L. Baghumyan, G. Fabris, L. Kapoor,
F. Hassani, J.M. Fink, S. Calcaterra, D. Chrastina, G. Isella, G. Katsaros, Nature
Communications 15 (2024).
corr_author: '1'
das_tickbox: '1'
dataavailabilitystatement: All experimental data included in this work will be available
at the ISTA Research Data Repository
date_created: 2024-07-04T11:40:45Z
date_published: 2024-07-30T00:00:00Z
date_updated: 2026-10-02T11:23:23Z
day: '30'
ddc:
- '530'
department:
- _id: GeKa
- _id: JoFi
- _id: GradSch
doi: 10.1038/s41467-024-50763-6
external_id:
arxiv:
- '2403.16774'
isi:
- '001281271000022'
pmid:
- '39080279'
file:
- access_level: open_access
checksum: ddf5361dcb6c543e2cea818501c09910
content_type: application/pdf
creator: dernst
date_created: 2024-08-05T08:38:01Z
date_updated: 2024-08-05T08:38:01Z
file_id: '17388'
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file_size: 1928001
relation: main_file
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file_date_updated: 2024-08-05T08:38:01Z
fulldoi: https://doi.org/10.1038/s41467-024-50763-6
has_accepted_license: '1'
intvolume: ' 15'
isi: 1
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: bd8bd29e-d553-11ed-ba76-f0070d4b237a
grant_number: P36507
name: Merging spin and superconducting qubits in planar Ge
- _id: c0977eea-5a5b-11eb-8a69-a862db0cf4d1
grant_number: I05060
name: High impedance circuit quantum electrodynamics with hole spins
- _id: 262116AA-B435-11E9-9278-68D0E5697425
name: Hybrid Semiconductor - Superconductor Quantum Devices
- _id: 3AC91DDA-15DF-11EA-824D-93A3E7B544D1
call_identifier: FWF
name: FWF Open Access Fund
publication: Nature Communications
publication_identifier:
eissn:
- 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
link:
- relation: erratum
url: https://doi.org/10.1038/s41467-024-53910-1
record:
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relation: research_data
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researchdata_availability: yes
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supplementarymaterial: yes
title: A gate tunable transmon qubit in planar Ge
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 15
year: '2024'
...
---
OA_place: repository
_id: '18144'
abstract:
- lang: eng
text: "High kinetic inductance superconductors are gaining increasing interest for\r\nthe
realisation of qubits, amplifiers and detectors. Moreover, thanks to their\r\nhigh
impedance, quantum buses made of such materials enable large zero-point\r\nfluctuations
of the voltage, boosting the coupling rates to spin and charge\r\nqubits. However,
fully exploiting the potential of disordered or granular\r\nsuperconductors is
challenging, as their inductance and, therefore, impedance\r\nat high values are
difficult to control. Here we have integrated a granular\r\naluminium resonator,
having a characteristic impedance exceeding the resistance\r\nquantum, with a
germanium double quantum dot and demonstrate strong\r\ncharge-photon coupling
with a rate of $g_\\text{c}/2\\pi= (566 \\pm 2)$ MHz. This\r\nwas achieved due
to the realisation of a wireless ohmmeter, which allows\r\n\\emph{in situ} measurements
during film deposition and, therefore, control of\r\nthe kinetic inductance of
granular aluminium films. Reproducible fabrication of\r\ncircuits with impedances
(inductances) exceeding 13 k$\\Omega$ (1 nH per square)\r\nis now possible. This
broadly applicable method opens the path for novel qubits\r\nand high-fidelity,
long-distance two-qubit gates."
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: "We acknowledge Franco De Palma, Mahya Khorramshahi, Fabian Oppliger,
Thomas Reisinger, Pasquale Scarlino and Xiao Xue for helpful discussions. This research
was supported by the Scientific Service Units of ISTA through resources provided
by the MIBA Machine Shop and the Nanofabrication facility. This research and related
results were made possible with the support of the NOMIS Foundation, the HORIZON-RIA
101069515 project, the FWF Projects with DOI:10.55776/P32235, DOI:10.55776/I5060
and DOI:10.55776/P36507. IMP acknowledges funding from the Deutsche Forschungsgemeinschaft
(DFG – German Research Foundation) under project number 450396347 (GeHoldeQED).
ICN2 acknowledges funding from Generalitat de Catalunya 2021SGR00457. We acknowledge
support from CSIC Interdisciplinary Thematic Platform (PTI+) on Quantum Technologies
(PTI-QTEP+). This research work has been funded by the European Commission – NextGenerationEU
(Regulation EU 2020/2094), through CSIC’s\r\nQuantum Technologies Platform (QTEP).
ICN2 is supported by the Severo Ochoa program from Spanish MCIN/AEI (Grant No.:
CEX2021-001214-S) and is funded by the CERCA Programme/Generalitat de Catalunya.
Part of the present work has been performed in the framework of Universitat Autònoma
de Barcelona Materials Science PhD program. AGM has received funding from Grant
RYC2021-033479-I funded by MCIN/AEI/10.13039/501100011033 and by European Union
NextGenerationEU/PRTR. M.B. acknowledges support from SUR Generalitat de Catalunya
and the EU Social Fund; project ref. 2020 FI 00103. The authors\r\nacknowledge the
use of instrumentation and the technical advice provided by the Joint Electron Microscopy
Center at ALBA (JEMCA). ICN2 acknowledges funding from Grant IU16-014206 (METCAM-FIB)
funded by the European Union through the European Regional Development\r\nFund (ERDF),
with the support of the Ministry of Research and Universities, Generalitat de Catalunya.
ICN2 is a founding member of e-DREAM [60]."
article_number: '2407.03079'
article_processing_charge: No
arxiv: 1
author:
- first_name: Marian
full_name: Janik, Marian
id: 396A1950-F248-11E8-B48F-1D18A9856A87
last_name: Janik
orcid: 0009-0003-9037-8831
- first_name: Kevin Etienne Robert
full_name: Roux, Kevin Etienne Robert
id: 53f93ea2-803f-11ed-ab7e-b283135794ef
last_name: Roux
- first_name: Carla N
full_name: Borja Espinosa, Carla N
id: 18777c01-896a-11ed-bdf8-e4851dc07d16
last_name: Borja Espinosa
- first_name: Oliver
full_name: Sagi, Oliver
id: 71616374-A8E9-11E9-A7CA-09ECE5697425
last_name: Sagi
- first_name: Abdulhamid
full_name: Baghdadi, Abdulhamid
id: 160D87FA-96B5-11E9-BF77-7626E6697425
last_name: Baghdadi
- first_name: Thomas
full_name: Adletzberger, Thomas
id: 38756BB2-F248-11E8-B48F-1D18A9856A87
last_name: Adletzberger
- first_name: Stefano
full_name: Calcaterra, Stefano
last_name: Calcaterra
- first_name: Marc
full_name: Botifoll, Marc
last_name: Botifoll
- first_name: Alba Garzón
full_name: Manjón, Alba Garzón
last_name: Manjón
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Daniel
full_name: Chrastina, Daniel
last_name: Chrastina
- first_name: Giovanni
full_name: Isella, Giovanni
last_name: Isella
- first_name: Ioan M.
full_name: Pop, Ioan M.
last_name: Pop
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Janik M, Roux KER, Borja Espinosa CN, et al. Strong charge-photon coupling
in planar germanium enabled by granular aluminium superinductors. arXiv.
doi:10.48550/arXiv.2407.03079
apa: Janik, M., Roux, K. E. R., Borja Espinosa, C. N., Sagi, O., Baghdadi, A., Adletzberger,
T., … Katsaros, G. (n.d.). Strong charge-photon coupling in planar germanium enabled
by granular aluminium superinductors. arXiv. https://doi.org/10.48550/arXiv.2407.03079
chicago: Janik, Marian, Kevin Etienne Robert Roux, Carla N Borja Espinosa, Oliver
Sagi, Abdulhamid Baghdadi, Thomas Adletzberger, Stefano Calcaterra, et al. “Strong
Charge-Photon Coupling in Planar Germanium Enabled by Granular Aluminium Superinductors.”
ArXiv, n.d. https://doi.org/10.48550/arXiv.2407.03079.
ieee: M. Janik et al., “Strong charge-photon coupling in planar germanium
enabled by granular aluminium superinductors,” arXiv. .
ista: Janik M, Roux KER, Borja Espinosa CN, Sagi O, Baghdadi A, Adletzberger T,
Calcaterra S, Botifoll M, Manjón AG, Arbiol J, Chrastina D, Isella G, Pop IM,
Katsaros G. Strong charge-photon coupling in planar germanium enabled by granular
aluminium superinductors. arXiv, 2407.03079.
mla: Janik, Marian, et al. “Strong Charge-Photon Coupling in Planar Germanium Enabled
by Granular Aluminium Superinductors.” ArXiv, 2407.03079, doi:10.48550/arXiv.2407.03079.
short: M. Janik, K.E.R. Roux, C.N. Borja Espinosa, O. Sagi, A. Baghdadi, T. Adletzberger,
S. Calcaterra, M. Botifoll, A.G. Manjón, J. Arbiol, D. Chrastina, G. Isella, I.M.
Pop, G. Katsaros, ArXiv (n.d.).
corr_author: '1'
das_tickbox: '1'
date_created: 2024-09-26T09:50:43Z
date_published: 2024-07-03T00:00:00Z
date_updated: 2026-10-20T22:31:22Z
day: '03'
department:
- _id: GeKa
- _id: GradSch
- _id: JoFi
doi: 10.48550/arXiv.2407.03079
external_id:
arxiv:
- '2407.03079'
fulldoi: https://doi.org/10.48550/arXiv.2407.03079
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2407.03079
month: '07'
oa: 1
oa_version: Preprint
project:
- _id: 34c0acea-11ca-11ed-8bc3-8775e10fd452
grant_number: '101069515'
name: Integrated Germanium Quantum Technology
- _id: 237B3DA4-32DE-11EA-91FC-C7463DDC885E
call_identifier: FWF
grant_number: P32235
name: Towards scalable hut wire quantum devices
- _id: bd8bd29e-d553-11ed-ba76-f0070d4b237a
grant_number: P36507
name: Merging spin and superconducting qubits in planar Ge
- _id: c0977eea-5a5b-11eb-8a69-a862db0cf4d1
grant_number: I05060
name: High impedance circuit quantum electrodynamics with hole spins
publication: arXiv
publication_status: draft
related_material:
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relation: later_version
status: public
- id: '18129'
relation: dissertation_contains
status: public
researchdata_availability: yes
status: public
supplementarymaterial: unclear
title: Strong charge-photon coupling in planar germanium enabled by granular aluminium
superinductors
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: preprint
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2024'
...
---
OA_place: repository
_id: '13312'
abstract:
- lang: eng
text: "Superconductor/semiconductor hybrid devices have attracted increasing\r\ninterest
in the past years. Superconducting electronics aims to complement\r\nsemiconductor
technology, while hybrid architectures are at the forefront of\r\nnew ideas such
as topological superconductivity and protected qubits. In this\r\nwork, we engineer
the induced superconductivity in two-dimensional germanium\r\nhole gas by varying
the distance between the quantum well and the aluminum. We\r\ndemonstrate a hard
superconducting gap and realize an electrically and flux\r\ntunable superconducting
diode using a superconducting quantum interference\r\ndevice (SQUID). This allows
to tune the current phase relation (CPR), to a\r\nregime where single Cooper pair
tunneling is suppressed, creating a $ \\sin\r\n\\left( 2 \\varphi \\right)$ CPR.
Shapiro experiments complement this\r\ninterpretation and the microwave drive
allows to create a diode with $ \\approx\r\n100 \\%$ efficiency. The reported
results open up the path towards monolithic\r\nintegration of spin qubit devices,
microwave resonators and (protected)\r\nsuperconducting qubits on a silicon technology
compatible platform."
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: "The authors acknowledge Alexander Brinkmann, Alessandro Crippa,
Andrew Higginbotham, Andrea Iorio, Giordano\r\nScappucci and Christian Schonenberger
for helpful discussions. We thank Marcel Verheijen for the support in the\r\nTEM
analysis. This research and related results were made\r\npossible with the support
of the NOMIS Foundation. It was\r\nsupported by the Scientific Service Units of
ISTA through resources provided by the MIBA Machine Shop and the\r\nnanofabrication
facility, the European Union’s Horizon 2020\r\nresearch and innovation programme
under Grant Agreement\r\nNo 862046, the HORIZON-RIA 101069515 project and the\r\nFWF
Projects #P-32235, #P-36507 and #F-8606. R.S.S.\r\nacknowledges Spanish CM “Talento
Program” Project No.\r\n2022-T1/IND-24070."
article_number: '2306.07109'
article_processing_charge: No
arxiv: 1
author:
- first_name: Marco
full_name: Valentini, Marco
id: C0BB2FAC-D767-11E9-B658-BC13E6697425
last_name: Valentini
- first_name: Oliver
full_name: Sagi, Oliver
id: 71616374-A8E9-11E9-A7CA-09ECE5697425
last_name: Sagi
- first_name: Levon
full_name: Baghumyan, Levon
last_name: Baghumyan
- first_name: Thijs de
full_name: Gijsel, Thijs de
last_name: Gijsel
- first_name: Jason
full_name: Jung, Jason
id: 4C9ACE7A-F248-11E8-B48F-1D18A9856A87
last_name: Jung
- first_name: Stefano
full_name: Calcaterra, Stefano
last_name: Calcaterra
- first_name: Andrea
full_name: Ballabio, Andrea
last_name: Ballabio
- first_name: Juan Aguilera
full_name: Servin, Juan Aguilera
last_name: Servin
- first_name: Kushagra
full_name: Aggarwal, Kushagra
id: b22ab905-3539-11eb-84c3-fc159dcd79cb
last_name: Aggarwal
orcid: 0000-0001-9985-9293
- first_name: Marian
full_name: Janik, Marian
id: 396A1950-F248-11E8-B48F-1D18A9856A87
last_name: Janik
orcid: 0009-0003-9037-8831
- first_name: Thomas
full_name: Adletzberger, Thomas
id: 38756BB2-F248-11E8-B48F-1D18A9856A87
last_name: Adletzberger
- first_name: Rubén Seoane
full_name: Souto, Rubén Seoane
last_name: Souto
- first_name: Martin
full_name: Leijnse, Martin
last_name: Leijnse
- first_name: Jeroen
full_name: Danon, Jeroen
last_name: Danon
- first_name: Constantin
full_name: Schrade, Constantin
last_name: Schrade
- first_name: Erik
full_name: Bakkers, Erik
last_name: Bakkers
- first_name: Daniel
full_name: Chrastina, Daniel
last_name: Chrastina
- first_name: Giovanni
full_name: Isella, Giovanni
last_name: Isella
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Valentini M, Sagi O, Baghumyan L, et al. Radio frequency driven superconducting
diode and parity conserving Cooper pair transport in a two-dimensional germanium
hole gas. arXiv. doi:10.48550/arXiv.2306.07109
apa: Valentini, M., Sagi, O., Baghumyan, L., Gijsel, T. de, Jung, J., Calcaterra,
S., … Katsaros, G. (n.d.). Radio frequency driven superconducting diode and parity
conserving Cooper pair transport in a two-dimensional germanium hole gas. arXiv.
https://doi.org/10.48550/arXiv.2306.07109
chicago: Valentini, Marco, Oliver Sagi, Levon Baghumyan, Thijs de Gijsel, Jason
Jung, Stefano Calcaterra, Andrea Ballabio, et al. “Radio Frequency Driven Superconducting
Diode and Parity Conserving Cooper Pair Transport in a Two-Dimensional Germanium
Hole Gas.” ArXiv, n.d. https://doi.org/10.48550/arXiv.2306.07109.
ieee: M. Valentini et al., “Radio frequency driven superconducting diode
and parity conserving Cooper pair transport in a two-dimensional germanium hole
gas,” arXiv. .
ista: Valentini M, Sagi O, Baghumyan L, Gijsel T de, Jung J, Calcaterra S, Ballabio
A, Servin JA, Aggarwal K, Janik M, Adletzberger T, Souto RS, Leijnse M, Danon
J, Schrade C, Bakkers E, Chrastina D, Isella G, Katsaros G. Radio frequency driven
superconducting diode and parity conserving Cooper pair transport in a two-dimensional
germanium hole gas. arXiv, 2306.07109.
mla: Valentini, Marco, et al. “Radio Frequency Driven Superconducting Diode and
Parity Conserving Cooper Pair Transport in a Two-Dimensional Germanium Hole Gas.”
ArXiv, 2306.07109, doi:10.48550/arXiv.2306.07109.
short: M. Valentini, O. Sagi, L. Baghumyan, T. de Gijsel, J. Jung, S. Calcaterra,
A. Ballabio, J.A. Servin, K. Aggarwal, M. Janik, T. Adletzberger, R.S. Souto,
M. Leijnse, J. Danon, C. Schrade, E. Bakkers, D. Chrastina, G. Isella, G. Katsaros,
ArXiv (n.d.).
corr_author: '1'
date_created: 2023-07-26T11:17:20Z
date_published: 2023-06-13T00:00:00Z
date_updated: 2026-10-02T10:23:31Z
day: '13'
ddc:
- '530'
department:
- _id: GeKa
- _id: M-Shop
doi: 10.48550/arXiv.2306.07109
ec_funded: 1
external_id:
arxiv:
- '2306.07109'
fulldoi: https://doi.org/10.48550/arXiv.2306.07109
keyword:
- Mesoscale and Nanoscale Physics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2306.07109
month: '06'
oa: 1
oa_version: Preprint
project:
- _id: 237E5020-32DE-11EA-91FC-C7463DDC885E
call_identifier: H2020
grant_number: '862046'
name: TOPOLOGICALLY PROTECTED AND SCALABLE QUANTUM BITS
- _id: 237B3DA4-32DE-11EA-91FC-C7463DDC885E
call_identifier: FWF
grant_number: P32235
name: Towards scalable hut wire quantum devices
- _id: bd8bd29e-d553-11ed-ba76-f0070d4b237a
grant_number: P36507
name: Merging spin and superconducting qubits in planar Ge
- _id: 34a66131-11ca-11ed-8bc3-a31681c6b03e
grant_number: F8606
name: 'Center for Correlated Quantum Materials and Solid State Quantum Systems:
Conventional and unconventional topological superconductors'
- _id: eb9b30ac-77a9-11ec-83b8-871f581d53d2
name: Protected states of quantum matter
publication: arXiv
publication_status: draft
related_material:
record:
- id: '13286'
relation: dissertation_contains
status: public
- id: '14793'
relation: later_version
status: public
status: public
title: Radio frequency driven superconducting diode and parity conserving Cooper
pair transport in a two-dimensional germanium hole gas
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: preprint
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2023'
...
---
_id: '10920'
abstract:
- lang: eng
text: The spin-orbit interaction permits to control the state of a spin qubit via
electric fields. For holes it is particularly strong, allowing for fast all electrical
qubit manipulation, and yet an in-depth understanding of this interaction in hole
systems is missing. Here we investigate, experimentally and theoretically, the
effect of the cubic Rashba spin-orbit interaction on the mixing of the spin states
by studying singlet-triplet oscillations in a planar Ge hole double quantum dot.
Landau-Zener sweeps at different magnetic field directions allow us to disentangle
the effects of the spin-orbit induced spin-flip term from those caused by strongly
site-dependent and anisotropic quantum dot g tensors. Our work, therefore, provides
new insights into the hole spin-orbit interaction, necessary for optimizing future
qubit experiments.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: "This research was supported by the Scientific Service Units of ISTA
through resources provided by the MIBA Machine Shop and the nanofabrication facility.
This project has received funding from the European Union’s Horizon 2020 research
and innovation program under the Marie\r\nSkłodowska-Curie Grant Agreement No. 844511,
No. 75441, and by the FWF-P 30207, I05060, and M3032-N projects. A. B. acknowledges
support from the EU Horizon-2020 FET project microSPIRE, ID: 766955. P.M. M. and
G. B. acknowledge funding by the Deutsche Forschungsgemeinschaft (DFG—German Research
Foundation) under Project No. 450396347. This work was supported by the Royal Society
(URF\\R1\\191150) and the European Research Council (Grant Agreement No. 948932),
N. A. acknowledges the use of the University of Oxford Advanced Research Computing
(ARC) facility."
article_number: '126803'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Daniel
full_name: Jirovec, Daniel
id: 4C473F58-F248-11E8-B48F-1D18A9856A87
last_name: Jirovec
orcid: 0000-0002-7197-4801
- first_name: Philipp M.
full_name: Mutter, Philipp M.
last_name: Mutter
- first_name: Andrea C
full_name: Hofmann, Andrea C
id: 340F461A-F248-11E8-B48F-1D18A9856A87
last_name: Hofmann
- first_name: Alessandro
full_name: Crippa, Alessandro
id: 1F2B21A2-F6E7-11E9-9B82-F7DBE5697425
last_name: Crippa
orcid: 0000-0002-2968-611X
- first_name: Marek
full_name: Rychetsky, Marek
last_name: Rychetsky
- first_name: David L.
full_name: Craig, David L.
last_name: Craig
- first_name: Josip
full_name: Kukucka, Josip
id: 3F5D8856-F248-11E8-B48F-1D18A9856A87
last_name: Kukucka
- first_name: Frederico
full_name: Martins, Frederico
id: 38F80F9A-1CB8-11EA-BC76-B49B3DDC885E
last_name: Martins
orcid: 0000-0003-2668-2401
- first_name: Andrea
full_name: Ballabio, Andrea
last_name: Ballabio
- first_name: Natalia
full_name: Ares, Natalia
last_name: Ares
- first_name: Daniel
full_name: Chrastina, Daniel
last_name: Chrastina
- first_name: Giovanni
full_name: Isella, Giovanni
last_name: Isella
- first_name: 'Guido '
full_name: 'Burkard, Guido '
last_name: Burkard
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Jirovec D, Mutter PM, Hofmann AC, et al. Dynamics of hole singlet-triplet qubits
with large g-factor differences. Physical Review Letters. 2022;128(12).
doi:10.1103/PhysRevLett.128.126803
apa: Jirovec, D., Mutter, P. M., Hofmann, A. C., Crippa, A., Rychetsky, M., Craig,
D. L., … Katsaros, G. (2022). Dynamics of hole singlet-triplet qubits with large
g-factor differences. Physical Review Letters. American Physical Society.
https://doi.org/10.1103/PhysRevLett.128.126803
chicago: Jirovec, Daniel, Philipp M. Mutter, Andrea C Hofmann, Alessandro Crippa,
Marek Rychetsky, David L. Craig, Josip Kukucka, et al. “Dynamics of Hole Singlet-Triplet
Qubits with Large g-Factor Differences.” Physical Review Letters. American
Physical Society, 2022. https://doi.org/10.1103/PhysRevLett.128.126803.
ieee: D. Jirovec et al., “Dynamics of hole singlet-triplet qubits with large
g-factor differences,” Physical Review Letters, vol. 128, no. 12. American
Physical Society, 2022.
ista: Jirovec D, Mutter PM, Hofmann AC, Crippa A, Rychetsky M, Craig DL, Kukucka
J, Martins F, Ballabio A, Ares N, Chrastina D, Isella G, Burkard G, Katsaros G.
2022. Dynamics of hole singlet-triplet qubits with large g-factor differences.
Physical Review Letters. 128(12), 126803.
mla: Jirovec, Daniel, et al. “Dynamics of Hole Singlet-Triplet Qubits with Large
g-Factor Differences.” Physical Review Letters, vol. 128, no. 12, 126803,
American Physical Society, 2022, doi:10.1103/PhysRevLett.128.126803.
short: D. Jirovec, P.M. Mutter, A.C. Hofmann, A. Crippa, M. Rychetsky, D.L. Craig,
J. Kukucka, F. Martins, A. Ballabio, N. Ares, D. Chrastina, G. Isella, G. Burkard,
G. Katsaros, Physical Review Letters 128 (2022).
corr_author: '1'
date_created: 2022-03-24T15:51:11Z
date_published: 2022-03-24T00:00:00Z
date_updated: 2025-04-14T07:44:07Z
day: '24'
ddc:
- '530'
department:
- _id: GradSch
- _id: GeKa
doi: 10.1103/PhysRevLett.128.126803
ec_funded: 1
external_id:
arxiv:
- '2111.05130'
isi:
- '000786542500004'
pmid:
- '35394319'
file:
- access_level: open_access
checksum: 6e66ad548d18db9c131f304acbd5a1f4
content_type: application/pdf
creator: dernst
date_created: 2022-03-28T06:53:39Z
date_updated: 2022-03-28T06:53:39Z
file_id: '10928'
file_name: 2022_PhysRevLetters_Jirovec.pdf
file_size: 1266515
relation: main_file
success: 1
file_date_updated: 2022-03-28T06:53:39Z
fulldoi: https://doi.org/10.1103/PhysRevLett.128.126803
has_accepted_license: '1'
intvolume: ' 128'
isi: 1
issue: '12'
language:
- iso: eng
month: '03'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 26A151DA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '844511'
name: Majorana bound states in Ge/SiGe heterostructures
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
- _id: 2641CE5E-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P30207
name: Hole spin orbit qubits in Ge quantum wells
- _id: c0977eea-5a5b-11eb-8a69-a862db0cf4d1
grant_number: I05060
name: High impedance circuit quantum electrodynamics with hole spins
- _id: c08c05c4-5a5b-11eb-8a69-dc6ce49d7973
grant_number: M03032
name: Long-range spin exchange for 2D qubits architectures
publication: Physical Review Letters
publication_identifier:
eissn:
- 1079-7114
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
related_material:
record:
- id: '18291'
relation: popular_science
status: public
scopus_import: '1'
status: public
title: Dynamics of hole singlet-triplet qubits with large g-factor differences
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 128
year: '2022'
...
---
_id: '12118'
abstract:
- lang: eng
text: Hybrid semiconductor–superconductor devices hold great promise for realizing
topological quantum computing with Majorana zero modes1,2,3,4,5. However, multiple
claims of Majorana detection, based on either tunnelling6,7,8,9,10 or Coulomb
blockade (CB) spectroscopy11,12, remain disputed. Here we devise an experimental
protocol that allows us to perform both types of measurement on the same hybrid
island by adjusting its charging energy via tunable junctions to the normal leads.
This method reduces ambiguities of Majorana detections by checking the consistency
between CB spectroscopy and zero-bias peaks in non-blockaded transport. Specifically,
we observe junction-dependent, even–odd modulated, single-electron CB peaks in
InAs/Al hybrid nanowires without concomitant low-bias peaks in tunnelling spectroscopy.
We provide a theoretical interpretation of the experimental observations in terms
of low-energy, longitudinally confined island states rather than overlapping Majorana
modes. Our results highlight the importance of combined measurements on the same
device for the identification of topological Majorana zero modes.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: We thank P. Krogstrup for providing us with the NW materials. We
thank A. Higginbotham, E. J. H. Lee, C. Marcus and S. Vaitiekėnas for helpful discussions
and G. Steffensen for his input on the diffusive Little-Parks theory. This research
was supported by the Scientific Service Units of ISTA through resources provided
by the MIBA Machine Shop and the nanofabrication facility; the NOMIS Foundation;
the CSIC Interdisciplinary Thematic Platform (PTI+) on Quantum Technologies (PTI-QTEP+).
A.H. acknowledges support from H2020-MSCA-IF-2018/844511. ICN2 also acknowledges
funding from Generalitat de Catalunya 2017 SGR 327. ICN2 is supported by the Severo
Ochoa Program from Spanish MINECO (Grant no. SEV-2017-0706) and is funded by the
CERCA Programme/Generalitat de Catalunya. Part of the present work has been performed
in the framework of Universitat Autònoma de Barcelona Materials Science PhD programme.
Authors acknowledge the use of instrumentation as well as the technical advice provided
by the National Facility ELECMI ICTS, node ‘Laboratorio de Microscopías Avanzadas’
at University of Zaragoza. This project has received funding from the European Union’s
Horizon 2020 research and innovation programme under grant agreement no. 823717-ESTEEM3.
This study was supported by MCIN with funding from European Union NextGenerationEU
(PRTR-C17.I1) and Generalitat de Catalunya. This research is part of the CSIC programme
for the Spanish Recovery, Transformation and Resilience Plan funded by the Recovery
and Resilience Facility of the European Union, established by the Regulation (EU)
2020/2094. We thank support from Grant PGC2018-097018-BI00, project FlagERA TOPOGRAPH
(PCI2018-093026) and project NANOGEN (PID2020-116093RB-C43), funded by MCIN/AEI/10.13039/501100011033/
and by ‘ERDF A way of making Europe’, by the European Union. M. Botifoll acknowledges
support from SUR Generalitat de Catalunya and the EU Social Fund (project ref. 2020
FI 00103).
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Marco
full_name: Valentini, Marco
id: C0BB2FAC-D767-11E9-B658-BC13E6697425
last_name: Valentini
- first_name: Maksim
full_name: Borovkov, Maksim
id: 2ac7a0a2-3562-11eb-9256-fbd18ea55087
last_name: Borovkov
- first_name: Elsa
full_name: Prada, Elsa
last_name: Prada
- first_name: Sara
full_name: Martí-Sánchez, Sara
last_name: Martí-Sánchez
- first_name: Marc
full_name: Botifoll, Marc
last_name: Botifoll
- first_name: Andrea C
full_name: Hofmann, Andrea C
id: 340F461A-F248-11E8-B48F-1D18A9856A87
last_name: Hofmann
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Ramón
full_name: Aguado, Ramón
last_name: Aguado
- first_name: Pablo
full_name: San-Jose, Pablo
last_name: San-Jose
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Valentini M, Borovkov M, Prada E, et al. Majorana-like Coulomb spectroscopy
in the absence of zero-bias peaks. Nature. 2022;612(7940):442-447. doi:10.1038/s41586-022-05382-w
apa: Valentini, M., Borovkov, M., Prada, E., Martí-Sánchez, S., Botifoll, M., Hofmann,
A. C., … Katsaros, G. (2022). Majorana-like Coulomb spectroscopy in the absence
of zero-bias peaks. Nature. Springer Nature. https://doi.org/10.1038/s41586-022-05382-w
chicago: Valentini, Marco, Maksim Borovkov, Elsa Prada, Sara Martí-Sánchez, Marc
Botifoll, Andrea C Hofmann, Jordi Arbiol, Ramón Aguado, Pablo San-Jose, and Georgios
Katsaros. “Majorana-like Coulomb Spectroscopy in the Absence of Zero-Bias Peaks.”
Nature. Springer Nature, 2022. https://doi.org/10.1038/s41586-022-05382-w.
ieee: M. Valentini et al., “Majorana-like Coulomb spectroscopy in the absence
of zero-bias peaks,” Nature, vol. 612, no. 7940. Springer Nature, pp. 442–447,
2022.
ista: Valentini M, Borovkov M, Prada E, Martí-Sánchez S, Botifoll M, Hofmann AC,
Arbiol J, Aguado R, San-Jose P, Katsaros G. 2022. Majorana-like Coulomb spectroscopy
in the absence of zero-bias peaks. Nature. 612(7940), 442–447.
mla: Valentini, Marco, et al. “Majorana-like Coulomb Spectroscopy in the Absence
of Zero-Bias Peaks.” Nature, vol. 612, no. 7940, Springer Nature, 2022,
pp. 442–47, doi:10.1038/s41586-022-05382-w.
short: M. Valentini, M. Borovkov, E. Prada, S. Martí-Sánchez, M. Botifoll, A.C.
Hofmann, J. Arbiol, R. Aguado, P. San-Jose, G. Katsaros, Nature 612 (2022) 442–447.
corr_author: '1'
date_created: 2023-01-12T11:56:45Z
date_published: 2022-12-15T00:00:00Z
date_updated: 2026-04-07T13:27:22Z
day: '15'
department:
- _id: GeKa
doi: 10.1038/s41586-022-05382-w
ec_funded: 1
external_id:
arxiv:
- '2203.07829'
isi:
- '000899725400001'
pmid:
- '36517713'
fulldoi: https://doi.org/10.1038/s41586-022-05382-w
intvolume: ' 612'
isi: 1
issue: '7940'
keyword:
- Multidisciplinary
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.2203.07829'
month: '12'
oa: 1
oa_version: Preprint
page: 442-447
pmid: 1
project:
- _id: 26A151DA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '844511'
name: Majorana bound states in Ge/SiGe heterostructures
publication: Nature
publication_identifier:
eissn:
- 1476-4687
issn:
- 0028-0836
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
link:
- description: News on ISTA Website
relation: press_release
url: https://ista.ac.at/en/news/imposter-particles-revealed-and-explained/
record:
- id: '12522'
relation: research_data
status: public
- id: '13286'
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title: Majorana-like Coulomb spectroscopy in the absence of zero-bias peaks
type: journal_article
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volume: 612
year: '2022'
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author:
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
- first_name: Daniel
full_name: Jirovec, Daniel
id: 4C473F58-F248-11E8-B48F-1D18A9856A87
last_name: Jirovec
orcid: 0000-0002-7197-4801
citation:
ama: "Katsaros G, Jirovec D. Dynamics of Hole Singlet-Triplet Qubits with Large
\U0001D454-Factor Differences. 2022. doi:10.15479/AT:ISTA:18291"
apa: "Katsaros, G., & Jirovec, D. (2022). Dynamics of Hole Singlet-Triplet Qubits
with Large \U0001D454-Factor Differences. Institute of Science and Technology
Austria. https://doi.org/10.15479/AT:ISTA:18291"
chicago: "Katsaros, Georgios, and Daniel Jirovec. “Dynamics of Hole Singlet-Triplet
Qubits with Large \U0001D454-Factor Differences.” Institute of Science and Technology
Austria, 2022. https://doi.org/10.15479/AT:ISTA:18291."
ieee: "G. Katsaros and D. Jirovec, “Dynamics of Hole Singlet-Triplet Qubits with
Large \U0001D454-Factor Differences.” Institute of Science and Technology Austria,
2022."
ista: "Katsaros G, Jirovec D. 2022. Dynamics of Hole Singlet-Triplet Qubits with
Large \U0001D454-Factor Differences, Institute of Science and Technology Austria,
10.15479/AT:ISTA:18291."
mla: "Katsaros, Georgios, and Daniel Jirovec. Dynamics of Hole Singlet-Triplet
Qubits with Large \U0001D454-Factor Differences. Institute of Science and
Technology Austria, 2022, doi:10.15479/AT:ISTA:18291."
short: G. Katsaros, D. Jirovec, (2022).
corr_author: '1'
date_created: 2024-10-09T19:35:03Z
date_published: 2022-03-01T00:00:00Z
date_updated: 2025-04-15T07:15:24Z
day: '01'
department:
- _id: GeKa
doi: 10.15479/AT:ISTA:18291
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title: "Dynamics of Hole Singlet-Triplet Qubits with Large \U0001D454-Factor Differences"
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