---
OA_place: repository
OA_type: green
_id: '21870'
abstract:
- lang: eng
text: Superconducting qubits are a leading candidate for utility-scale quantum computing
due to their fast gate speeds and steadily decreasing error rates. The requirement
for millikelvin operating temperatures, however, creates a significant scaling
bottleneck. Modular architectures using optical fiber links could bridge separate
cryogenic nodes, but superconducting circuits do not have coherent optical transitions
and microwave-to-optical conversion has not been shown for any non-classical photon
state. In this work, we demonstrate the on-demand generation and tomographic reconstruction
of itinerant single microwave photons at 8.9 GHz from a superconducting qubit.
We upconvert this non-Gaussian state with a transducer added noise below 0.012
quanta and count the converted telecom photons at 193.4 THz with a signal-to-noise
ratio of up to 5.1$\pm$1.1. We characterize the trade-offs between throughput
and noise, and establish a viable path toward heralded entanglement distribution
and gate teleportation. Looking ahead, these results empower existing superconducting
devices to take a key role in distributed quantum technologies and heterogeneous
quantum systems.
acknowledgement: "We thank Fritz Diorico and Onur Hosten who suggested the filter
cavity design, and gave important insights about the assembly and the testing of
the FabryPerot filter cavities. Ekatrina Fedotova and Diego A.\r\nLancheros Naranjo
worked on the filter cavity setup in\r\nthe early stages of this work. Gustavo Wiederhecker
and\r\nYiewen Chu provided insights as to the origins of the\r\nobserved optical
noise and Nicola Carlon Zambon suggested using telecom filters to mitigate it further.
This\r\nwork was supported by the European Research Council under grant agreement
no. 101089099 (ERC CoG\r\ncQEO), and 101248662 (ERC POC CoupledEOT), the\r\nEuropean
Unions Horizon 2020 research and innovation\r\nprogram under grant agreement no.
899354 (FETopen\r\nSuperQuLAN), the European Innovation Council no.\r\n101187231
(PathfinderOpen CIELO), and the Austrian\r\nScience Fund (FWF) no. F7105 (SFB BeyondC).
J.F.\r\nand L.K. acknowledge support from the Horizon Europe\r\nProgram HORIZON-CL4-2022-QUANTUM-01-SGA
via\r\nProject No. 101113946 OpenSuperQPlus100. A.M. acknowledges support from the
NOMIS-ISTA fellowship."
article_processing_charge: No
arxiv: 1
author:
- first_name: Thomas
full_name: Werner, Thomas
id: 1fcd8497-dba3-11ea-a45e-c6fbd715f7c7
last_name: Werner
orcid: 0009-0001-2346-5236
- first_name: Erfan
full_name: Riyazi, Erfan
id: 53322f94-5355-11ee-ae5a-ff6f81c87d51
last_name: Riyazi
- first_name: Samarth
full_name: Hawaldar, Samarth
id: 221708e1-1ff6-11ee-9fa6-85146607433e
last_name: Hawaldar
orcid: 0000-0002-1965-4309
- first_name: Rishabh
full_name: Sahu, Rishabh
id: 47D26E34-F248-11E8-B48F-1D18A9856A87
last_name: Sahu
orcid: 0000-0001-6264-2162
- first_name: Georg M
full_name: Arnold, Georg M
id: 3770C838-F248-11E8-B48F-1D18A9856A87
last_name: Arnold
orcid: 0000-0003-1397-7876
- first_name: Paul Falthansl-Scheinecker
full_name: Paul Falthansl-Scheinecker, Paul Falthansl-Scheinecker
last_name: Paul Falthansl-Scheinecker
- first_name: Jennifer A. Sánchez
full_name: Naranjo, Jennifer A. Sánchez
last_name: Naranjo
- first_name: Dante
full_name: Loi, Dante
last_name: Loi
- first_name: Lucky N.
full_name: Kapoor, Lucky N.
last_name: Kapoor
- first_name: Martin
full_name: Zemlicka, Martin
id: 2DCF8DE6-F248-11E8-B48F-1D18A9856A87
last_name: Zemlicka
orcid: 0009-0005-0878-3032
- first_name: Liu
full_name: Qiu, Liu
id: 45e99c0d-1eb1-11eb-9b96-ed8ab2983cac
last_name: Qiu
orcid: 0000-0003-4345-4267
- first_name: Andrei
full_name: Militaru, Andrei
id: d67706f8-8eb1-11ee-ad1b-9c30dfa19e0b
last_name: Militaru
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: Werner T, Riyazi E, Hawaldar S, et al. Electro-optic conversion of itinerant
Fock states. arXiv. doi:10.48550/arXiv.2602.00928
apa: Werner, T., Riyazi, E., Hawaldar, S., Sahu, R., Arnold, G. M., Paul Falthansl-Scheinecker,
P. F.-S., … Fink, J. M. (n.d.). Electro-optic conversion of itinerant Fock states.
arXiv. https://doi.org/10.48550/arXiv.2602.00928
chicago: Werner, Thomas, Erfan Riyazi, Samarth Hawaldar, Rishabh Sahu, Georg M Arnold,
Paul Falthansl-Scheinecker Paul Falthansl-Scheinecker, Jennifer A. Sánchez Naranjo,
et al. “Electro-Optic Conversion of Itinerant Fock States.” ArXiv, n.d.
https://doi.org/10.48550/arXiv.2602.00928.
ieee: T. Werner et al., “Electro-optic conversion of itinerant Fock states,”
arXiv. .
ista: Werner T, Riyazi E, Hawaldar S, Sahu R, Arnold GM, Paul Falthansl-Scheinecker
PF-S, Naranjo JAS, Loi D, Kapoor LN, Zemlicka M, Qiu L, Militaru A, Fink JM. Electro-optic
conversion of itinerant Fock states. arXiv, 10.48550/arXiv.2602.00928.
mla: Werner, Thomas, et al. “Electro-Optic Conversion of Itinerant Fock States.”
ArXiv, doi:10.48550/arXiv.2602.00928.
short: T. Werner, E. Riyazi, S. Hawaldar, R. Sahu, G.M. Arnold, P.F.-S. Paul Falthansl-Scheinecker,
J.A.S. Naranjo, D. Loi, L.N. Kapoor, M. Zemlicka, L. Qiu, A. Militaru, J.M. Fink,
ArXiv (n.d.).
corr_author: '1'
date_created: 2026-05-12T13:58:18Z
date_published: 2026-01-31T00:00:00Z
date_updated: 2026-05-20T13:35:42Z
day: '31'
department:
- _id: JoFi
- _id: GradSch
doi: 10.48550/arXiv.2602.00928
ec_funded: 1
external_id:
arxiv:
- '2602.00928'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2602.00928
month: '01'
oa: 1
oa_version: Preprint
project:
- _id: bdadfa0d-d553-11ed-ba76-fb85edbd456a
grant_number: '101089099'
name: 'Cavity Quantum Electro Optics: Microwave photonics with nonclassical states'
- _id: 5b807754-ab3d-11f0-914f-ff8c34502cc9
grant_number: '101248662'
name: Integrated optical coupling for low loss electro-optic interconnects
- _id: 9B868D20-BA93-11EA-9121-9846C619BF3A
call_identifier: H2020
grant_number: '899354'
name: Quantum Local Area Networks with Superconducting Qubits
- _id: 91aaf765-16d5-11f0-9cad-a8e7e44cccb7
grant_number: '101187231'
name: 'Cavity-Integrated Electro-Optics: Measuring, Converting and Manipulating
Microwaves with Light'
- _id: 26927A52-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: F07105
name: Integrating superconducting quantum circuits
- _id: 9B861AAC-BA93-11EA-9121-9846C619BF3A
name: NOMIS Fellowship Program
publication: arXiv
publication_status: draft
related_material:
record:
- id: '21863'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Electro-optic conversion of itinerant Fock 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: preprint
user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9
year: '2026'
...
---
OA_place: publisher
OA_type: hybrid
_id: '19073'
abstract:
- lang: eng
text: The rapid development of superconducting quantum hardware is expected to run
into substantial restrictions on scalability because error correction in a cryogenic
environment has stringent input–output requirements. Classical data centres rely
on fibre-optic interconnects to remove similar networking bottlenecks. In the
same spirit, ultracold electro-optic links have been proposed and used to generate
qubit control signals, or to replace cryogenic readout electronics. So far, these
approaches have suffered from either low efficiency, low bandwidth or additional
noise. Here we realize radio-over-fibre qubit readout at millikelvin temperatures.
We use one device to simultaneously perform upconversion and downconversion between
microwave and optical frequencies and so do not require any active or passive
cryogenic microwave equipment. We demonstrate all-optical single-shot readout
in a circulator-free readout scheme. Importantly, we do not observe any direct
radiation impact on the qubit state, despite the absence of shielding elements.
This compatibility between superconducting circuits and telecom-wavelength light
is not only a prerequisite to establish modular quantum networks, but it is also
relevant for multiplexed readout of superconducting photon detectors and classical
superconducting logic.
acknowledgement: We thank F. Hassani and M. Zemlicka for assistance with qubit design
and high-power readout, respectively, and P. Winkel and I. Pop at Karlsruhe Institute
of Technology for providing the JPA. This work was supported by the European Research
Council under grant nos. 758053 (ERC StG QUNNECT) and 101089099 (ERC CoG cQEO),
and the European Union’s Horizon 2020 research and innovation program under grant
no. 899354 (FETopen SuperQuLAN). This research was funded in whole, or in part,
by the Austrian Science Fund (FWF) DOI 10.55776/F71. L.Q. acknowledges generous
support from the ISTFELLOW programme and G.A. is the recipient of a DOC fellowship
of the Austrian Academy of Sciences at IST Austria. Open access funding provided
by Institute of Science and Technology (IST Austria).
article_number: '9470'
article_processing_charge: Yes (via OA deal)
article_type: original
author:
- first_name: Georg M
full_name: Arnold, Georg M
id: 3770C838-F248-11E8-B48F-1D18A9856A87
last_name: Arnold
orcid: 0000-0003-1397-7876
- first_name: Thomas
full_name: Werner, Thomas
id: 1fcd8497-dba3-11ea-a45e-c6fbd715f7c7
last_name: Werner
orcid: 0009-0001-2346-5236
- first_name: Rishabh
full_name: Sahu, Rishabh
id: 47D26E34-F248-11E8-B48F-1D18A9856A87
last_name: Sahu
orcid: 0000-0001-6264-2162
- first_name: Lucky
full_name: Kapoor, Lucky
id: 84b9700b-15b2-11ec-abd3-831089e67615
last_name: Kapoor
orcid: 0000-0001-8319-2148
- first_name: Liu
full_name: Qiu, Liu
id: 45e99c0d-1eb1-11eb-9b96-ed8ab2983cac
last_name: Qiu
orcid: 0000-0003-4345-4267
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: Arnold GM, Werner T, Sahu R, Kapoor L, Qiu L, Fink JM. All-optical superconducting
qubit readout. Nature Physics. 2025;21. doi:10.1038/s41567-024-02741-4
apa: Arnold, G. M., Werner, T., Sahu, R., Kapoor, L., Qiu, L., & Fink, J. M.
(2025). All-optical superconducting qubit readout. Nature Physics. Springer
Nature. https://doi.org/10.1038/s41567-024-02741-4
chicago: Arnold, Georg M, Thomas Werner, Rishabh Sahu, Lucky Kapoor, Liu Qiu, and
Johannes M Fink. “All-Optical Superconducting Qubit Readout.” Nature Physics.
Springer Nature, 2025. https://doi.org/10.1038/s41567-024-02741-4.
ieee: G. M. Arnold, T. Werner, R. Sahu, L. Kapoor, L. Qiu, and J. M. Fink, “All-optical
superconducting qubit readout,” Nature Physics, vol. 21. Springer Nature,
2025.
ista: Arnold GM, Werner T, Sahu R, Kapoor L, Qiu L, Fink JM. 2025. All-optical superconducting
qubit readout. Nature Physics. 21, 9470.
mla: Arnold, Georg M., et al. “All-Optical Superconducting Qubit Readout.” Nature
Physics, vol. 21, 9470, Springer Nature, 2025, doi:10.1038/s41567-024-02741-4.
short: G.M. Arnold, T. Werner, R. Sahu, L. Kapoor, L. Qiu, J.M. Fink, Nature Physics
21 (2025).
corr_author: '1'
date_created: 2025-02-23T23:01:57Z
date_published: 2025-03-01T00:00:00Z
date_updated: 2026-05-20T13:35:42Z
day: '01'
ddc:
- '530'
department:
- _id: JoFi
doi: 10.1038/s41567-024-02741-4
ec_funded: 1
external_id:
isi:
- '001417760400001'
pmid:
- '40093969'
file:
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checksum: ab7469aca9e2e068eb78e5c5c1efaf7d
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creator: dernst
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file_name: 2025_NaturePhysics_Arnold.pdf
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file_date_updated: 2025-04-16T08:09:43Z
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month: '03'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 26336814-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '758053'
name: A Fiber Optic Transceiver for Superconducting Qubits
- _id: bdadfa0d-d553-11ed-ba76-fb85edbd456a
grant_number: '101089099'
name: 'Cavity Quantum Electro Optics: Microwave photonics with nonclassical states'
- _id: 9B868D20-BA93-11EA-9121-9846C619BF3A
call_identifier: H2020
grant_number: '899354'
name: Quantum Local Area Networks with Superconducting Qubits
- _id: 2671EB66-B435-11E9-9278-68D0E5697425
name: Coherent on-chip conversion of superconducting qubit signals from microwaves
to optical frequencies
- _id: bdb108fd-d553-11ed-ba76-83dc74a9864f
grant_number: F07105
name: QUANTUM INFORMATION SYSTEMS BEYOND CLASSICAL CAPABILITIES / P5- Integration
of Superconducting Quantum Circuits
publication: Nature Physics
publication_identifier:
eissn:
- 1745-2481
issn:
- 1745-2473
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/when-qubits-learn-the-language-of-fiberoptics/
record:
- id: '18953'
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status: public
title: All-optical superconducting qubit readout
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: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 21
year: '2025'
...
---
OA_place: publisher
OA_type: hybrid
_id: '19280'
abstract:
- lang: eng
text: Recent advancements in superconducting circuits have enabled the experimental
study of collective behavior of precisely controlled intermediate-scale ensembles
of qubits. In this work, we demonstrate an atomic frequency comb formed by individual
artificial atoms strongly coupled to a single resonator mode. We observe periodic
microwave pulses that originate from a single coherent excitation dynamically
interacting with the multiqubit ensemble. We show that this revival dynamics emerges
as a consequence of the constructive and periodic rephasing of the five superconducting
qubits forming the vacuum Rabi split comb. In the future, similar devices could
be used as a memory with in situ tunable storage time or as an on-chip periodic
pulse generator with nonclassical photon statistics.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: 'The authors thank G. Arnold and R. Sahu for the discussions, L.
Drmic for software development, the MIBA workshop and the ISTA nanofabrication facility
for technical support, and VTT Technical Research Centre of Finland for providing
us TWPAs for follow-up measurements. This work was supported by the Austrian Science
Fund (FWF) [Grant DOI: 10.55776/F71] through BeyondC (F7105) and IST Austria. E. S. R.
is the recipient of a DOC fellowship of the Austrian Academy of Sciences at IST
Austria. J. M. F. and M. Ž. acknowledge support from the European Research Council
under Grant Agreement No. 758053 (ERC StG QUNNECT) and a NOMIS foundation research
grant.'
article_number: '063601'
article_processing_charge: Yes (via OA deal)
article_type: original
arxiv: 1
author:
- first_name: Elena
full_name: Redchenko, Elena
id: 2C21D6E8-F248-11E8-B48F-1D18A9856A87
last_name: Redchenko
- first_name: M.
full_name: Zens, M.
last_name: Zens
- first_name: Martin
full_name: Zemlicka, Martin
id: 2DCF8DE6-F248-11E8-B48F-1D18A9856A87
last_name: Zemlicka
orcid: 0009-0005-0878-3032
- first_name: Matilda
full_name: Peruzzo, Matilda
id: 3F920B30-F248-11E8-B48F-1D18A9856A87
last_name: Peruzzo
orcid: 0000-0002-3415-4628
- first_name: Farid
full_name: Hassani, Farid
id: 2AED110C-F248-11E8-B48F-1D18A9856A87
last_name: Hassani
orcid: 0000-0001-6937-5773
- first_name: Riya
full_name: Sett, Riya
id: 2E6D040E-F248-11E8-B48F-1D18A9856A87
last_name: Sett
orcid: 0000-0001-7641-8348
- first_name: Przemyslaw D
full_name: Zielinski, Przemyslaw D
id: e198fcc4-f6e0-11ea-865d-b6a256760ee8
last_name: Zielinski
- first_name: H. S.
full_name: Dhar, H. S.
last_name: Dhar
- first_name: D. O.
full_name: Krimer, D. O.
last_name: Krimer
- first_name: S.
full_name: Rotter, S.
last_name: Rotter
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: Redchenko E, Zens M, Zemlicka M, et al. Observation of collapse and revival
in a superconducting atomic frequency comb. Physical Review Letters. 2025;134(6).
doi:10.1103/PhysRevLett.134.063601
apa: Redchenko, E., Zens, M., Zemlicka, M., Peruzzo, M., Hassani, F., Sett, R.,
… Fink, J. M. (2025). Observation of collapse and revival in a superconducting
atomic frequency comb. Physical Review Letters. American Physical Society.
https://doi.org/10.1103/PhysRevLett.134.063601
chicago: Redchenko, Elena, M. Zens, Martin Zemlicka, Matilda Peruzzo, Farid Hassani,
Riya Sett, Przemyslaw D Zielinski, et al. “Observation of Collapse and Revival
in a Superconducting Atomic Frequency Comb.” Physical Review Letters. American
Physical Society, 2025. https://doi.org/10.1103/PhysRevLett.134.063601.
ieee: E. Redchenko et al., “Observation of collapse and revival in a superconducting
atomic frequency comb,” Physical Review Letters, vol. 134, no. 6. American
Physical Society, 2025.
ista: Redchenko E, Zens M, Zemlicka M, Peruzzo M, Hassani F, Sett R, Zielinski PD,
Dhar HS, Krimer DO, Rotter S, Fink JM. 2025. Observation of collapse and revival
in a superconducting atomic frequency comb. Physical Review Letters. 134(6), 063601.
mla: Redchenko, Elena, et al. “Observation of Collapse and Revival in a Superconducting
Atomic Frequency Comb.” Physical Review Letters, vol. 134, no. 6, 063601,
American Physical Society, 2025, doi:10.1103/PhysRevLett.134.063601.
short: E. Redchenko, M. Zens, M. Zemlicka, M. Peruzzo, F. Hassani, R. Sett, P.D.
Zielinski, H.S. Dhar, D.O. Krimer, S. Rotter, J.M. Fink, Physical Review Letters
134 (2025).
corr_author: '1'
date_created: 2025-03-02T23:01:52Z
date_published: 2025-02-14T00:00:00Z
date_updated: 2026-07-05T22:30:30Z
day: '14'
ddc:
- '530'
department:
- _id: JoFi
doi: 10.1103/PhysRevLett.134.063601
ec_funded: 1
external_id:
arxiv:
- '2310.04200'
isi:
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creator: dernst
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file_name: 2025_PhysReviewLetters_Redchenko.pdf
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language:
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month: '02'
oa: 1
oa_version: Published Version
pmid: 1
project:
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grant_number: F07105
name: QUANTUM INFORMATION SYSTEMS BEYOND CLASSICAL CAPABILITIES / P5- Integration
of Superconducting Quantum Circuits
- _id: 26336814-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '758053'
name: A Fiber Optic Transceiver for Superconducting Qubits
- _id: 26B354CA-B435-11E9-9278-68D0E5697425
name: Controllable Collective States of Superconducting Qubit Ensembles
publication: Physical Review Letters
publication_identifier:
eissn:
- 1079-7114
issn:
- 0031-9007
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
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scopus_import: '1'
status: public
title: Observation of collapse and revival in a superconducting atomic frequency comb
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: 134
year: '2025'
...
---
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'
date_created: 2024-07-04T11:40:45Z
date_published: 2024-07-30T00:00:00Z
date_updated: 2026-04-07T13:01:55Z
day: '30'
ddc:
- '530'
department:
- _id: GeKa
- _id: JoFi
- _id: GradSch
doi: 10.1038/s41467-024-50763-6
external_id:
arxiv:
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isi:
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pmid:
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content_type: application/pdf
creator: dernst
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oa_version: Published Version
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name: Merging spin and superconducting qubits in planar Ge
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url: https://doi.org/10.1038/s41467-024-53910-1
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title: A gate tunable transmon qubit in planar Ge
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legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
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abstract:
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text: "The photon blockade breakdown in a continuously driven cavity QED system
has been proposed as a prime example for a first-order driven-dissipative quantum
phase transition. However, the predicted scaling from a microscopic behavior—dominated
by quantum fluctuations—to a macroscopic one—characterized by stable phases—and
the associated exponents and phase diagram have not been observed so far. In this
work we couple a single transmon qubit with a fixed coupling strength \U0001D454
to a superconducting cavity that is in situ bandwidth \U0001D705 tunable to controllably
approach this thermodynamic limit. Even though the system remains microscopic,
we observe its behavior becoming increasingly macroscopic as a function of \U0001D454/\U0001D705.
For the highest realized \U0001D454/\U0001D705 of approximately 287, the system
switches with a characteristic timescale as long as 6 s between a bright coherent
state with approximately 8×103 intracavity photons and the vacuum state. This
exceeds the microscopic timescales by 6 orders of magnitude and approaches the
perfect hysteresis expected between two macroscopic attractors in the thermodynamic
limit. These findings and interpretation are qualitatively supported by neoclassical
theory and large-scale quantum-jump Monte Carlo simulations. Besides shedding
more light on driven-dissipative physics in the limit of strong light-matter coupling,
this system might also find applications in quantum sensing and metrology."
acknowledged_ssus:
- _id: M-Shop
acknowledgement: This work has received funding from the Austrian Science Fund (FWF)
through BeyondC (F7105) and the European Union’s Horizon 2020 research and innovation
program under Grant Agreement No. 862644 (FETopen QUARTET). A.V. acknowledges support
from the National Research, Development and Innovation Office of Hungary (NKFIH)
within the Quantum Information National Laboratory of Hungary. The authors thank
the MIBA workshop and the Institute of Science and Technology Austria nanofabrication
facility for technical support. We are grateful to HUN-REN Cloud for providing us
with suitable computational infrastructure for the simulations.
article_number: '010327'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Riya
full_name: Sett, Riya
id: 2E6D040E-F248-11E8-B48F-1D18A9856A87
last_name: Sett
orcid: 0000-0001-7641-8348
- first_name: Farid
full_name: Hassani, Farid
id: 2AED110C-F248-11E8-B48F-1D18A9856A87
last_name: Hassani
orcid: 0000-0001-6937-5773
- first_name: Duc T
full_name: Phan, Duc T
id: 29C8C0B4-F248-11E8-B48F-1D18A9856A87
last_name: Phan
- first_name: Shabir
full_name: Barzanjeh, Shabir
id: 2D25E1F6-F248-11E8-B48F-1D18A9856A87
last_name: Barzanjeh
orcid: 0000-0003-0415-1423
- first_name: Andras
full_name: Vukics, Andras
last_name: Vukics
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: Sett R, Hassani F, Phan DT, Barzanjeh S, Vukics A, Fink JM. Emergent macroscopic
bistability induced by a single superconducting qubit. PRX Quantum. 2024;5(1).
doi:10.1103/prxquantum.5.010327
apa: Sett, R., Hassani, F., Phan, D. T., Barzanjeh, S., Vukics, A., & Fink,
J. M. (2024). Emergent macroscopic bistability induced by a single superconducting
qubit. PRX Quantum. American Physical Society. https://doi.org/10.1103/prxquantum.5.010327
chicago: Sett, Riya, Farid Hassani, Duc T Phan, Shabir Barzanjeh, Andras Vukics,
and Johannes M Fink. “Emergent Macroscopic Bistability Induced by a Single Superconducting
Qubit.” PRX Quantum. American Physical Society, 2024. https://doi.org/10.1103/prxquantum.5.010327.
ieee: R. Sett, F. Hassani, D. T. Phan, S. Barzanjeh, A. Vukics, and J. M. Fink,
“Emergent macroscopic bistability induced by a single superconducting qubit,”
PRX Quantum, vol. 5, no. 1. American Physical Society, 2024.
ista: Sett R, Hassani F, Phan DT, Barzanjeh S, Vukics A, Fink JM. 2024. Emergent
macroscopic bistability induced by a single superconducting qubit. PRX Quantum.
5(1), 010327.
mla: Sett, Riya, et al. “Emergent Macroscopic Bistability Induced by a Single Superconducting
Qubit.” PRX Quantum, vol. 5, no. 1, 010327, American Physical Society,
2024, doi:10.1103/prxquantum.5.010327.
short: R. Sett, F. Hassani, D.T. Phan, S. Barzanjeh, A. Vukics, J.M. Fink, PRX Quantum
5 (2024).
corr_author: '1'
date_created: 2024-06-27T10:58:06Z
date_published: 2024-02-16T00:00:00Z
date_updated: 2026-07-05T22:30:30Z
day: '16'
ddc:
- '530'
department:
- _id: JoFi
- _id: AnHi
doi: 10.1103/prxquantum.5.010327
ec_funded: 1
external_id:
arxiv:
- '2210.14182'
isi:
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content_type: application/pdf
creator: cchlebak
date_created: 2024-06-28T12:04:43Z
date_updated: 2024-06-28T12:04:43Z
file_id: '17185'
file_name: 2024_PRXQuantum_Sett.pdf
file_size: 1443351
relation: main_file
success: 1
file_date_updated: 2024-06-28T12:04:43Z
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intvolume: ' 5'
isi: 1
issue: '1'
language:
- iso: eng
month: '02'
oa: 1
oa_version: Published Version
project:
- _id: 237CBA6C-32DE-11EA-91FC-C7463DDC885E
call_identifier: H2020
grant_number: '862644'
name: Quantum readout techniques and technologies
- _id: 3AC91DDA-15DF-11EA-824D-93A3E7B544D1
call_identifier: FWF
name: FWF Open Access Fund
- _id: bdb108fd-d553-11ed-ba76-83dc74a9864f
grant_number: F07105
name: QUANTUM INFORMATION SYSTEMS BEYOND CLASSICAL CAPABILITIES / P5- Integration
of Superconducting Quantum Circuits
publication: PRX Quantum
publication_identifier:
eissn:
- 2691-3399
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
related_material:
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relation: dissertation_contains
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scopus_import: '1'
status: public
title: Emergent macroscopic bistability induced by a single superconducting qubit
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
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---
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abstract:
- lang: eng
text: "Data analysis files for the manuscript \"Emergent Macroscopic Bistability
Induced by a Single Superconducting Qubit\".\r\n\r\nThis contains the raw data
and the data analysis files for generating the figures in the manuscript.\r\n\r\n
Figure1 file - The raw data of cavity transmission spectra for 6 different kappas
are there. They are fitted with input-output theory in the python file.\r\n Figure2
file - The raw data at 8 MHz kappa are included. all hte figures in figure 2 are
generated in the python file\r\n Figure3 file - The raw data of PBB single shot
measurements at all kappas are included. The detailed analysis and the Figure3
generated for the paper are all in the python analysis file. Also, thefiles containing
the time-evolution of the intensity from Master Equation solution are included.\r\nFigure4
file - The raw data at 2.6 MHz for different drive detunings and the corresponding
analyses are included. And the python file includes the analysis of the experimental
data as well as approximate neoclassical equations solutions for 2-level and 3-level
transmons are included. "
article_processing_charge: No
author:
- first_name: Riya
full_name: Sett, Riya
id: 2E6D040E-F248-11E8-B48F-1D18A9856A87
last_name: Sett
orcid: 0000-0001-7641-8348
- first_name: Farid
full_name: Hassani, Farid
id: 2AED110C-F248-11E8-B48F-1D18A9856A87
last_name: Hassani
orcid: 0000-0001-6937-5773
- first_name: Duc T
full_name: Phan, Duc T
id: 29C8C0B4-F248-11E8-B48F-1D18A9856A87
last_name: Phan
- first_name: Shabir
full_name: Barzanjeh, Shabir
id: 2D25E1F6-F248-11E8-B48F-1D18A9856A87
last_name: Barzanjeh
orcid: 0000-0003-0415-1423
- first_name: Andras
full_name: Vukics, Andras
last_name: Vukics
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: Sett R, Hassani F, Phan DT, Barzanjeh S, Vukics A, Fink JM. Data Analysis files
for “Emergent Macroscopic Bistability Induced by a Single Superconducting Qubit.”
2024. doi:10.5281/ZENODO.10518320
apa: Sett, R., Hassani, F., Phan, D. T., Barzanjeh, S., Vukics, A., & Fink,
J. M. (2024). Data Analysis files for “Emergent Macroscopic Bistability Induced
by a Single Superconducting Qubit.” Zenodo. https://doi.org/10.5281/ZENODO.10518320
chicago: Sett, Riya, Farid Hassani, Duc T Phan, Shabir Barzanjeh, Andras Vukics,
and Johannes M Fink. “Data Analysis Files for ‘Emergent Macroscopic Bistability
Induced by a Single Superconducting Qubit.’” Zenodo, 2024. https://doi.org/10.5281/ZENODO.10518320.
ieee: R. Sett, F. Hassani, D. T. Phan, S. Barzanjeh, A. Vukics, and J. M. Fink,
“Data Analysis files for ‘Emergent Macroscopic Bistability Induced by a Single
Superconducting Qubit.’” Zenodo, 2024.
ista: Sett R, Hassani F, Phan DT, Barzanjeh S, Vukics A, Fink JM. 2024. Data Analysis
files for ‘Emergent Macroscopic Bistability Induced by a Single Superconducting
Qubit’, Zenodo, 10.5281/ZENODO.10518320.
mla: Sett, Riya, et al. Data Analysis Files for “Emergent Macroscopic Bistability
Induced by a Single Superconducting Qubit.” Zenodo, 2024, doi:10.5281/ZENODO.10518320.
short: R. Sett, F. Hassani, D.T. Phan, S. Barzanjeh, A. Vukics, J.M. Fink, (2024).
corr_author: '1'
date_created: 2025-01-30T08:30:03Z
date_published: 2024-01-16T00:00:00Z
date_updated: 2026-07-05T22:30:29Z
day: '16'
ddc:
- '530'
department:
- _id: JoFi
- _id: AnHi
doi: 10.5281/ZENODO.10518320
has_accepted_license: '1'
main_file_link:
- open_access: '1'
url: https://doi.org/10.5281/zenodo.10518320
month: '01'
oa: 1
oa_version: Published Version
publisher: Zenodo
related_material:
record:
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relation: used_in_publication
status: public
- id: '19533'
relation: used_in_publication
status: public
status: public
title: Data Analysis files for "Emergent Macroscopic Bistability Induced by a Single
Superconducting Qubit"
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: research_data_reference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2024'
...
---
_id: '13106'
abstract:
- lang: eng
text: Quantum entanglement is a key resource in currently developed quantum technologies.
Sharing this fragile property between superconducting microwave circuits and optical
or atomic systems would enable new functionalities, but this has been hindered
by an energy scale mismatch of >104 and the resulting mutually imposed loss and
noise. In this work, we created and verified entanglement between microwave and
optical fields in a millikelvin environment. Using an optically pulsed superconducting
electro-optical device, we show entanglement between propagating microwave and
optical fields in the continuous variable domain. This achievement not only paves
the way for entanglement between superconducting circuits and telecom wavelength
light, but also has wide-ranging implications for hybrid quantum networks in the
context of modularization, scaling, sensing, and cross-platform verification.
acknowledgement: This work was supported by the European Research Council (grant no.
758053, ERC StG QUNNECT) and the European Union’s Horizon 2020 Research and Innovation
Program (grant no. 899354, FETopen SuperQuLAN). L.Q. acknowledges generous support
from the ISTFELLOW program. W.H. is the recipient of an ISTplus postdoctoral fellowship
with funding from the European Union’s Horizon 2020 Research and Innovation Program
(Marie Sklodowska-Curie grant no. 754411). G.A. is the recipient of a DOC fellowship
of the Austrian Academy of Sciences at IST Austria. J.M.F. acknowledges support
from the Austrian Science Fund (FWF) through BeyondC (grant no. F7105) and the European
Union’s Horizon 2020 Research and Innovation Program (grant no. 862644, FETopen
QUARTET).
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Rishabh
full_name: Sahu, Rishabh
id: 47D26E34-F248-11E8-B48F-1D18A9856A87
last_name: Sahu
orcid: 0000-0001-6264-2162
- first_name: Liu
full_name: Qiu, Liu
id: 45e99c0d-1eb1-11eb-9b96-ed8ab2983cac
last_name: Qiu
orcid: 0000-0003-4345-4267
- first_name: William J
full_name: Hease, William J
id: 29705398-F248-11E8-B48F-1D18A9856A87
last_name: Hease
orcid: 0000-0001-9868-2166
- first_name: Georg M
full_name: Arnold, Georg M
id: 3770C838-F248-11E8-B48F-1D18A9856A87
last_name: Arnold
orcid: 0000-0003-1397-7876
- first_name: Y.
full_name: Minoguchi, Y.
last_name: Minoguchi
- first_name: P.
full_name: Rabl, P.
last_name: Rabl
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: Sahu R, Qiu L, Hease WJ, et al. Entangling microwaves with light. Science.
2023;380(6646):718-721. doi:10.1126/science.adg3812
apa: Sahu, R., Qiu, L., Hease, W. J., Arnold, G. M., Minoguchi, Y., Rabl, P., &
Fink, J. M. (2023). Entangling microwaves with light. Science. American
Association for the Advancement of Science. https://doi.org/10.1126/science.adg3812
chicago: Sahu, Rishabh, Liu Qiu, William J Hease, Georg M Arnold, Y. Minoguchi,
P. Rabl, and Johannes M Fink. “Entangling Microwaves with Light.” Science.
American Association for the Advancement of Science, 2023. https://doi.org/10.1126/science.adg3812.
ieee: R. Sahu et al., “Entangling microwaves with light,” Science,
vol. 380, no. 6646. American Association for the Advancement of Science, pp. 718–721,
2023.
ista: Sahu R, Qiu L, Hease WJ, Arnold GM, Minoguchi Y, Rabl P, Fink JM. 2023. Entangling
microwaves with light. Science. 380(6646), 718–721.
mla: Sahu, Rishabh, et al. “Entangling Microwaves with Light.” Science, vol.
380, no. 6646, American Association for the Advancement of Science, 2023, pp.
718–21, doi:10.1126/science.adg3812.
short: R. Sahu, L. Qiu, W.J. Hease, G.M. Arnold, Y. Minoguchi, P. Rabl, J.M. Fink,
Science 380 (2023) 718–721.
corr_author: '1'
date_created: 2023-05-31T11:39:24Z
date_published: 2023-05-18T00:00:00Z
date_updated: 2026-04-15T06:39:33Z
day: '18'
department:
- _id: JoFi
doi: 10.1126/science.adg3812
ec_funded: 1
external_id:
arxiv:
- '2301.03315'
isi:
- '000996515200004'
pmid:
- '37200415'
intvolume: ' 380'
isi: 1
issue: '6646'
keyword:
- Multidisciplinary
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2301.03315
month: '05'
oa: 1
oa_version: Preprint
page: 718-721
pmid: 1
project:
- _id: 26336814-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '758053'
name: A Fiber Optic Transceiver for Superconducting Qubits
- _id: 9B868D20-BA93-11EA-9121-9846C619BF3A
call_identifier: H2020
grant_number: '899354'
name: Quantum Local Area Networks with Superconducting Qubits
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
- _id: 237CBA6C-32DE-11EA-91FC-C7463DDC885E
call_identifier: H2020
grant_number: '862644'
name: Quantum readout techniques and technologies
- _id: 2671EB66-B435-11E9-9278-68D0E5697425
name: Coherent on-chip conversion of superconducting qubit signals from microwaves
to optical frequencies
- _id: bdb108fd-d553-11ed-ba76-83dc74a9864f
grant_number: F07105
name: QUANTUM INFORMATION SYSTEMS BEYOND CLASSICAL CAPABILITIES / P5- Integration
of Superconducting Quantum Circuits
publication: Science
publication_identifier:
eissn:
- 1095-9203
issn:
- 0036-8075
publication_status: published
publisher: American Association for the Advancement of Science
quality_controlled: '1'
related_material:
link:
- description: News on ISTA Website
relation: press_release
url: https://ista.ac.at/en/news/wiring-up-quantum-circuits-with-light/
record:
- id: '13122'
relation: research_data
status: public
scopus_import: '1'
status: public
title: Entangling microwaves with light
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 380
year: '2023'
...
---
_id: '13124'
abstract:
- lang: eng
text: This dataset comprises all data shown in the figures of the submitted article
"Tunable directional photon scattering from a pair of superconducting qubits"
at arXiv:2205.03293. Additional raw data are available from the corresponding
author on reasonable request.
article_processing_charge: No
author:
- first_name: Elena
full_name: Redchenko, Elena
id: 2C21D6E8-F248-11E8-B48F-1D18A9856A87
last_name: Redchenko
- first_name: Alexander
full_name: Poshakinskiy, Alexander
last_name: Poshakinskiy
- first_name: Riya
full_name: Sett, Riya
id: 2E6D040E-F248-11E8-B48F-1D18A9856A87
last_name: Sett
orcid: 0000-0001-7641-8348
- first_name: Martin
full_name: Zemlicka, Martin
id: 2DCF8DE6-F248-11E8-B48F-1D18A9856A87
last_name: Zemlicka
orcid: 0009-0005-0878-3032
- first_name: Alexander
full_name: Poddubny, Alexander
last_name: Poddubny
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: Redchenko E, Poshakinskiy A, Sett R, Zemlicka M, Poddubny A, Fink JM. Tunable
directional photon scattering from a pair of superconducting qubits. 2023. doi:10.5281/ZENODO.7858567
apa: Redchenko, E., Poshakinskiy, A., Sett, R., Zemlicka, M., Poddubny, A., &
Fink, J. M. (2023). Tunable directional photon scattering from a pair of superconducting
qubits. Zenodo. https://doi.org/10.5281/ZENODO.7858567
chicago: Redchenko, Elena, Alexander Poshakinskiy, Riya Sett, Martin Zemlicka, Alexander
Poddubny, and Johannes M Fink. “Tunable Directional Photon Scattering from a Pair
of Superconducting Qubits.” Zenodo, 2023. https://doi.org/10.5281/ZENODO.7858567.
ieee: E. Redchenko, A. Poshakinskiy, R. Sett, M. Zemlicka, A. Poddubny, and J. M.
Fink, “Tunable directional photon scattering from a pair of superconducting qubits.”
Zenodo, 2023.
ista: Redchenko E, Poshakinskiy A, Sett R, Zemlicka M, Poddubny A, Fink JM. 2023.
Tunable directional photon scattering from a pair of superconducting qubits, Zenodo,
10.5281/ZENODO.7858567.
mla: Redchenko, Elena, et al. Tunable Directional Photon Scattering from a Pair
of Superconducting Qubits. Zenodo, 2023, doi:10.5281/ZENODO.7858567.
short: E. Redchenko, A. Poshakinskiy, R. Sett, M. Zemlicka, A. Poddubny, J.M. Fink,
(2023).
corr_author: '1'
date_created: 2023-06-06T07:36:50Z
date_published: 2023-04-28T00:00:00Z
date_updated: 2026-06-03T07:16:05Z
day: '28'
ddc:
- '530'
department:
- _id: JoFi
doi: 10.5281/ZENODO.7858567
main_file_link:
- open_access: '1'
url: https://doi.org/10.5281/zenodo.7858567
month: '04'
oa: 1
oa_version: Published Version
publisher: Zenodo
related_material:
record:
- id: '13117'
relation: used_in_publication
status: public
status: public
title: Tunable directional photon scattering from a pair of superconducting 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: research_data_reference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2023'
...
---
_id: '13227'
abstract:
- lang: eng
text: Currently available quantum processors are dominated by noise, which severely
limits their applicability and motivates the search for new physical qubit encodings.
In this work, we introduce the inductively shunted transmon, a weakly flux-tunable
superconducting qubit that offers charge offset protection for all levels and
a 20-fold reduction in flux dispersion compared to the state-of-the-art resulting
in a constant coherence over a full flux quantum. The parabolic confinement provided
by the inductive shunt as well as the linearity of the geometric superinductor
facilitates a high-power readout that resolves quantum jumps with a fidelity and
QND-ness of >90% and without the need for a Josephson parametric amplifier. Moreover,
the device reveals quantum tunneling physics between the two prepared fluxon ground
states with a measured average decay time of up to 3.5 h. In the future, fast
time-domain control of the transition matrix elements could offer a new path forward
to also achieve full qubit control in the decay-protected fluxon basis.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: The authors thank J. Koch for discussions and support with the scQubits
python package, I. Rozhansky and A. Poddubny for important insights into photon-assisted
tunneling, S. Barzanjeh and G. Arnold for theory, E. Redchenko, S. Pepic, the MIBA
workshop and the IST nanofabrication facility for technical contributions, as well
as L. Drmic, P. Zielinski and R. Sett for software development. We acknowledge the
prompt support of Quantum Machines to implement active state preparation with their
OPX+. This work was supported by a NOMIS foundation research grant (J.F.), the Austrian
Science Fund (FWF) through BeyondC F7105 (J.F.) and IST Austria.
article_number: '3968'
article_processing_charge: No
article_type: original
author:
- first_name: Farid
full_name: Hassani, Farid
id: 2AED110C-F248-11E8-B48F-1D18A9856A87
last_name: Hassani
orcid: 0000-0001-6937-5773
- first_name: Matilda
full_name: Peruzzo, Matilda
id: 3F920B30-F248-11E8-B48F-1D18A9856A87
last_name: Peruzzo
orcid: 0000-0002-3415-4628
- first_name: Lucky
full_name: Kapoor, Lucky
id: 84b9700b-15b2-11ec-abd3-831089e67615
last_name: Kapoor
orcid: 0000-0001-8319-2148
- first_name: Andrea
full_name: Trioni, Andrea
id: 42F71B44-F248-11E8-B48F-1D18A9856A87
last_name: Trioni
- first_name: Martin
full_name: Zemlicka, Martin
id: 2DCF8DE6-F248-11E8-B48F-1D18A9856A87
last_name: Zemlicka
orcid: 0009-0005-0878-3032
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: Hassani F, Peruzzo M, Kapoor L, Trioni A, Zemlicka M, Fink JM. Inductively
shunted transmons exhibit noise insensitive plasmon states and a fluxon decay
exceeding 3 hours. Nature Communications. 2023;14. doi:10.1038/s41467-023-39656-2
apa: Hassani, F., Peruzzo, M., Kapoor, L., Trioni, A., Zemlicka, M., & Fink,
J. M. (2023). Inductively shunted transmons exhibit noise insensitive plasmon
states and a fluxon decay exceeding 3 hours. Nature Communications. Springer
Nature. https://doi.org/10.1038/s41467-023-39656-2
chicago: Hassani, Farid, Matilda Peruzzo, Lucky Kapoor, Andrea Trioni, Martin Zemlicka,
and Johannes M Fink. “Inductively Shunted Transmons Exhibit Noise Insensitive
Plasmon States and a Fluxon Decay Exceeding 3 Hours.” Nature Communications.
Springer Nature, 2023. https://doi.org/10.1038/s41467-023-39656-2.
ieee: F. Hassani, M. Peruzzo, L. Kapoor, A. Trioni, M. Zemlicka, and J. M. Fink,
“Inductively shunted transmons exhibit noise insensitive plasmon states and a
fluxon decay exceeding 3 hours,” Nature Communications, vol. 14. Springer
Nature, 2023.
ista: Hassani F, Peruzzo M, Kapoor L, Trioni A, Zemlicka M, Fink JM. 2023. Inductively
shunted transmons exhibit noise insensitive plasmon states and a fluxon decay
exceeding 3 hours. Nature Communications. 14, 3968.
mla: Hassani, Farid, et al. “Inductively Shunted Transmons Exhibit Noise Insensitive
Plasmon States and a Fluxon Decay Exceeding 3 Hours.” Nature Communications,
vol. 14, 3968, Springer Nature, 2023, doi:10.1038/s41467-023-39656-2.
short: F. Hassani, M. Peruzzo, L. Kapoor, A. Trioni, M. Zemlicka, J.M. Fink, Nature
Communications 14 (2023).
corr_author: '1'
date_created: 2023-07-16T22:01:08Z
date_published: 2023-07-05T00:00:00Z
date_updated: 2026-04-15T06:39:57Z
day: '05'
ddc:
- '530'
department:
- _id: JoFi
doi: 10.1038/s41467-023-39656-2
external_id:
isi:
- '001024729900009'
pmid:
- '37407570'
file:
- access_level: open_access
checksum: a85773b5fe23516f60f7d5d31b55c200
content_type: application/pdf
creator: dernst
date_created: 2023-07-18T08:43:07Z
date_updated: 2023-07-18T08:43:07Z
file_id: '13248'
file_name: 2023_NatureComm_Hassani.pdf
file_size: 2899592
relation: main_file
success: 1
file_date_updated: 2023-07-18T08:43:07Z
has_accepted_license: '1'
intvolume: ' 14'
isi: 1
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 2622978C-B435-11E9-9278-68D0E5697425
name: Hybrid Semiconductor - Superconductor Quantum Devices
- _id: bdb108fd-d553-11ed-ba76-83dc74a9864f
grant_number: F07105
name: QUANTUM INFORMATION SYSTEMS BEYOND CLASSICAL CAPABILITIES / P5- Integration
of Superconducting Quantum Circuits
publication: Nature Communications
publication_identifier:
eissn:
- 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
record:
- id: '17133'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Inductively shunted transmons exhibit noise insensitive plasmon states and
a fluxon decay exceeding 3 hours
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: 14
year: '2023'
...
---
_id: '14517'
abstract:
- lang: eng
text: 'State-of-the-art transmon qubits rely on large capacitors, which systematically
improve their coherence due to reduced surface-loss participation. However, this
approach increases both the footprint and the parasitic cross-coupling and is
ultimately limited by radiation losses—a potential roadblock for scaling up quantum
processors to millions of qubits. In this work we present transmon qubits with
sizes as low as 36 × 39 µm2 with 100-nm-wide vacuum-gap capacitors that are micromachined
from commercial silicon-on-insulator wafers and shadow evaporated with aluminum.
We achieve a vacuum participation ratio up to 99.6% in an in-plane design that
is compatible with standard coplanar circuits. Qubit relaxationtime measurements
for small gaps with high zero-point electric field variance of up to 22 V/m reveal
a double exponential decay indicating comparably strong qubit interaction with
long-lived two-level systems. The exceptionally high selectivity of up to 20 dB
to the superconductor-vacuum interface allows us to precisely back out the sub-single-photon
dielectric loss tangent of aluminum oxide previously exposed to ambient conditions.
In terms of future scaling potential, we achieve a ratio of qubit quality factor
to a footprint area equal to 20 µm−2, which is comparable with the highest T1
devices relying on larger geometries, a value that could improve substantially
for lower surface-loss superconductors. '
acknowledged_ssus:
- _id: NanoFab
acknowledgement: "This work was supported by the Austrian Science Fund (FWF) through
BeyondC (F7105), the European Research Council under Grant Agreement No. 758053
(ERC StG QUNNECT) and a NOMIS foundation research grant. M.Z. was the recipient
of a SAIA scholarship, E.R. of\r\na DOC fellowship of the Austrian Academy of Sciences,
and M.P. of a Pöttinger scholarship at IST Austria. S.B. acknowledges support from
Marie Skłodowska Curie Program No. 707438 (MSC-IF SUPEREOM). J.M.F. acknowledges
support from the Horizon Europe Program HORIZON-CL4-2022-QUANTUM-01-SGA via Project
No. 101113946 OpenSuperQPlus100 and the ISTA Nanofabrication Facility."
article_number: '044054'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Martin
full_name: Zemlicka, Martin
id: 2DCF8DE6-F248-11E8-B48F-1D18A9856A87
last_name: Zemlicka
orcid: 0009-0005-0878-3032
- first_name: Elena
full_name: Redchenko, Elena
id: 2C21D6E8-F248-11E8-B48F-1D18A9856A87
last_name: Redchenko
- first_name: Matilda
full_name: Peruzzo, Matilda
id: 3F920B30-F248-11E8-B48F-1D18A9856A87
last_name: Peruzzo
orcid: 0000-0002-3415-4628
- first_name: Farid
full_name: Hassani, Farid
id: 2AED110C-F248-11E8-B48F-1D18A9856A87
last_name: Hassani
orcid: 0000-0001-6937-5773
- first_name: Andrea
full_name: Trioni, Andrea
id: 42F71B44-F248-11E8-B48F-1D18A9856A87
last_name: Trioni
- first_name: Shabir
full_name: Barzanjeh, Shabir
id: 2D25E1F6-F248-11E8-B48F-1D18A9856A87
last_name: Barzanjeh
orcid: 0000-0003-0415-1423
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: 'Zemlicka M, Redchenko E, Peruzzo M, et al. Compact vacuum-gap transmon qubits:
Selective and sensitive probes for superconductor surface losses. Physical
Review Applied. 2023;20(4). doi:10.1103/PhysRevApplied.20.044054'
apa: 'Zemlicka, M., Redchenko, E., Peruzzo, M., Hassani, F., Trioni, A., Barzanjeh,
S., & Fink, J. M. (2023). Compact vacuum-gap transmon qubits: Selective and
sensitive probes for superconductor surface losses. Physical Review Applied.
American Physical Society. https://doi.org/10.1103/PhysRevApplied.20.044054'
chicago: 'Zemlicka, Martin, Elena Redchenko, Matilda Peruzzo, Farid Hassani, Andrea
Trioni, Shabir Barzanjeh, and Johannes M Fink. “Compact Vacuum-Gap Transmon Qubits:
Selective and Sensitive Probes for Superconductor Surface Losses.” Physical
Review Applied. American Physical Society, 2023. https://doi.org/10.1103/PhysRevApplied.20.044054.'
ieee: 'M. Zemlicka et al., “Compact vacuum-gap transmon qubits: Selective
and sensitive probes for superconductor surface losses,” Physical Review Applied,
vol. 20, no. 4. American Physical Society, 2023.'
ista: 'Zemlicka M, Redchenko E, Peruzzo M, Hassani F, Trioni A, Barzanjeh S, Fink
JM. 2023. Compact vacuum-gap transmon qubits: Selective and sensitive probes for
superconductor surface losses. Physical Review Applied. 20(4), 044054.'
mla: 'Zemlicka, Martin, et al. “Compact Vacuum-Gap Transmon Qubits: Selective and
Sensitive Probes for Superconductor Surface Losses.” Physical Review Applied,
vol. 20, no. 4, 044054, American Physical Society, 2023, doi:10.1103/PhysRevApplied.20.044054.'
short: M. Zemlicka, E. Redchenko, M. Peruzzo, F. Hassani, A. Trioni, S. Barzanjeh,
J.M. Fink, Physical Review Applied 20 (2023).
corr_author: '1'
date_created: 2023-11-12T23:00:55Z
date_published: 2023-10-20T00:00:00Z
date_updated: 2026-06-03T07:16:02Z
day: '20'
department:
- _id: JoFi
doi: 10.1103/PhysRevApplied.20.044054
ec_funded: 1
external_id:
arxiv:
- '2206.14104'
isi:
- '001095315600001'
intvolume: ' 20'
isi: 1
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2206.14104
month: '10'
oa: 1
oa_version: Preprint
project:
- _id: 26336814-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '758053'
name: A Fiber Optic Transceiver for Superconducting Qubits
- _id: eb9b30ac-77a9-11ec-83b8-871f581d53d2
name: Protected states of quantum matter
- _id: 258047B6-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '707438'
name: 'Microwave-to-Optical Quantum Link: Quantum Teleportation and Quantum Illumination
with cavity Optomechanics'
- _id: bdb7cfc1-d553-11ed-ba76-d2eaab167738
grant_number: '101080139'
name: Open Superconducting Quantum Computers (OpenSuperQPlus)
- _id: bdb108fd-d553-11ed-ba76-83dc74a9864f
grant_number: F07105
name: QUANTUM INFORMATION SYSTEMS BEYOND CLASSICAL CAPABILITIES / P5- Integration
of Superconducting Quantum Circuits
publication: Physical Review Applied
publication_identifier:
eissn:
- 2331-7019
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
related_material:
record:
- id: '14520'
relation: research_data
status: public
scopus_import: '1'
status: public
title: 'Compact vacuum-gap transmon qubits: Selective and sensitive probes for superconductor
surface losses'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 20
year: '2023'
...
---
_id: '14872'
abstract:
- lang: eng
text: We entangled microwave and optical photons for the first time as verified
by a measured two-mode vacuum squeezing of 0.7 dB. This electro-optic entanglement
is the key resource needed to connect cryogenic quantum circuits.
article_number: LM1F.3
article_processing_charge: No
author:
- first_name: Rishabh
full_name: Sahu, Rishabh
id: 47D26E34-F248-11E8-B48F-1D18A9856A87
last_name: Sahu
orcid: 0000-0001-6264-2162
- first_name: Liu
full_name: Qiu, Liu
last_name: Qiu
- first_name: William J
full_name: Hease, William J
id: 29705398-F248-11E8-B48F-1D18A9856A87
last_name: Hease
orcid: 0000-0001-9868-2166
- first_name: Georg M
full_name: Arnold, Georg M
id: 3770C838-F248-11E8-B48F-1D18A9856A87
last_name: Arnold
orcid: 0000-0003-1397-7876
- first_name: Yuri
full_name: Minoguchi, Yuri
last_name: Minoguchi
- first_name: Peter
full_name: Rabl, Peter
last_name: Rabl
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: 'Sahu R, Qiu L, Hease WJ, et al. Entangling microwaves and telecom wavelength
light. In: Frontiers in Optics + Laser Science 2023. Optica Publishing
Group; 2023. doi:10.1364/ls.2023.lm1f.3'
apa: 'Sahu, R., Qiu, L., Hease, W. J., Arnold, G. M., Minoguchi, Y., Rabl, P., &
Fink, J. M. (2023). Entangling microwaves and telecom wavelength light. In Frontiers
in Optics + Laser Science 2023. Tacoma, WA, United States: Optica Publishing
Group. https://doi.org/10.1364/ls.2023.lm1f.3'
chicago: Sahu, Rishabh, Liu Qiu, William J Hease, Georg M Arnold, Yuri Minoguchi,
Peter Rabl, and Johannes M Fink. “Entangling Microwaves and Telecom Wavelength
Light.” In Frontiers in Optics + Laser Science 2023. Optica Publishing
Group, 2023. https://doi.org/10.1364/ls.2023.lm1f.3.
ieee: R. Sahu et al., “Entangling microwaves and telecom wavelength light,”
in Frontiers in Optics + Laser Science 2023, Tacoma, WA, United States,
2023.
ista: Sahu R, Qiu L, Hease WJ, Arnold GM, Minoguchi Y, Rabl P, Fink JM. 2023. Entangling
microwaves and telecom wavelength light. Frontiers in Optics + Laser Science 2023.
Laser Science, LM1F.3.
mla: Sahu, Rishabh, et al. “Entangling Microwaves and Telecom Wavelength Light.”
Frontiers in Optics + Laser Science 2023, LM1F.3, Optica Publishing Group,
2023, doi:10.1364/ls.2023.lm1f.3.
short: R. Sahu, L. Qiu, W.J. Hease, G.M. Arnold, Y. Minoguchi, P. Rabl, J.M. Fink,
in:, Frontiers in Optics + Laser Science 2023, Optica Publishing Group, 2023.
conference:
end_date: 2023-10-12
location: Tacoma, WA, United States
name: Laser Science
start_date: 2023-10-09
corr_author: '1'
date_created: 2024-01-22T12:29:41Z
date_published: 2023-10-01T00:00:00Z
date_updated: 2024-10-09T21:07:59Z
day: '01'
department:
- _id: JoFi
doi: 10.1364/ls.2023.lm1f.3
language:
- iso: eng
month: '10'
oa_version: None
publication: Frontiers in Optics + Laser Science 2023
publication_identifier:
isbn:
- '9781957171296'
publication_status: published
publisher: Optica Publishing Group
quality_controlled: '1'
status: public
title: Entangling microwaves and telecom wavelength light
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2023'
...
---
APC_amount: 6228 EUR
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '13200'
abstract:
- lang: eng
text: Recent quantum technologies have established precise quantum control of various
microscopic systems using electromagnetic waves. Interfaces based on cryogenic
cavity electro-optic systems are particularly promising, due to the direct interaction
between microwave and optical fields in the quantum regime. Quantum optical control
of superconducting microwave circuits has been precluded so far due to the weak
electro-optical coupling as well as quasi-particles induced by the pump laser.
Here we report the coherent control of a superconducting microwave cavity using
laser pulses in a multimode electro-optical device at millikelvin temperature
with near-unity cooperativity. Both the stationary and instantaneous responses
of the microwave and optical modes comply with the coherent electro-optical interaction,
and reveal only minuscule amount of excess back-action with an unanticipated time
delay. Our demonstration enables wide ranges of applications beyond quantum transductions,
from squeezing and quantum non-demolition measurements of microwave fields, to
entanglement generation and hybrid quantum networks.
acknowledgement: This work was supported by the European Research Council under grant
agreement no. 758053 (ERC StG QUNNECT), the European Union’s Horizon 2020 research
and innovation program under grant agreement no. 899354 (FETopen SuperQuLAN), and
the Austrian Science Fund (FWF) through BeyondC (F7105). L.Q. acknowledges generous
support from the ISTFELLOW programme. W.H. is the recipient of an ISTplus postdoctoral
fellowship with funding from the European Union’s Horizon 2020 research and innovation
program under the Marie Skłodowska-Curie grant agreement no. 754411. G.A. is the
recipient of a DOC fellowship of the Austrian Academy of Sciences at IST Austria.
article_number: '3784'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Liu
full_name: Qiu, Liu
id: 45e99c0d-1eb1-11eb-9b96-ed8ab2983cac
last_name: Qiu
orcid: 0000-0003-4345-4267
- first_name: Rishabh
full_name: Sahu, Rishabh
id: 47D26E34-F248-11E8-B48F-1D18A9856A87
last_name: Sahu
orcid: 0000-0001-6264-2162
- first_name: William J
full_name: Hease, William J
id: 29705398-F248-11E8-B48F-1D18A9856A87
last_name: Hease
orcid: 0000-0001-9868-2166
- first_name: Georg M
full_name: Arnold, Georg M
id: 3770C838-F248-11E8-B48F-1D18A9856A87
last_name: Arnold
orcid: 0000-0003-1397-7876
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: Qiu L, Sahu R, Hease WJ, Arnold GM, Fink JM. Coherent optical control of a
superconducting microwave cavity via electro-optical dynamical back-action. Nature
Communications. 2023;14. doi:10.1038/s41467-023-39493-3
apa: Qiu, L., Sahu, R., Hease, W. J., Arnold, G. M., & Fink, J. M. (2023). Coherent
optical control of a superconducting microwave cavity via electro-optical dynamical
back-action. Nature Communications. Nature Research. https://doi.org/10.1038/s41467-023-39493-3
chicago: Qiu, Liu, Rishabh Sahu, William J Hease, Georg M Arnold, and Johannes M
Fink. “Coherent Optical Control of a Superconducting Microwave Cavity via Electro-Optical
Dynamical Back-Action.” Nature Communications. Nature Research, 2023. https://doi.org/10.1038/s41467-023-39493-3.
ieee: L. Qiu, R. Sahu, W. J. Hease, G. M. Arnold, and J. M. Fink, “Coherent optical
control of a superconducting microwave cavity via electro-optical dynamical back-action,”
Nature Communications, vol. 14. Nature Research, 2023.
ista: Qiu L, Sahu R, Hease WJ, Arnold GM, Fink JM. 2023. Coherent optical control
of a superconducting microwave cavity via electro-optical dynamical back-action.
Nature Communications. 14, 3784.
mla: Qiu, Liu, et al. “Coherent Optical Control of a Superconducting Microwave Cavity
via Electro-Optical Dynamical Back-Action.” Nature Communications, vol.
14, 3784, Nature Research, 2023, doi:10.1038/s41467-023-39493-3.
short: L. Qiu, R. Sahu, W.J. Hease, G.M. Arnold, J.M. Fink, Nature Communications
14 (2023).
corr_author: '1'
date_created: 2023-07-09T22:01:11Z
date_published: 2023-06-24T00:00:00Z
date_updated: 2026-07-05T22:30:25Z
day: '24'
ddc:
- '000'
department:
- _id: JoFi
doi: 10.1038/s41467-023-39493-3
ec_funded: 1
external_id:
arxiv:
- '2210.12443'
isi:
- '001018100800002'
pmid:
- '37355691'
file:
- access_level: open_access
checksum: ec7ccd2c08f90d59cab302fd0d7776a4
content_type: application/pdf
creator: alisjak
date_created: 2023-07-10T10:10:54Z
date_updated: 2023-07-10T10:10:54Z
file_id: '13206'
file_name: 2023_NatureComms_Qiu.pdf
file_size: 1349134
relation: main_file
success: 1
file_date_updated: 2023-07-10T10:10:54Z
has_accepted_license: '1'
intvolume: ' 14'
isi: 1
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 26336814-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '758053'
name: A Fiber Optic Transceiver for Superconducting Qubits
- _id: 9B868D20-BA93-11EA-9121-9846C619BF3A
call_identifier: H2020
grant_number: '899354'
name: Quantum Local Area Networks with Superconducting Qubits
- _id: bdb108fd-d553-11ed-ba76-83dc74a9864f
grant_number: F07105
name: QUANTUM INFORMATION SYSTEMS BEYOND CLASSICAL CAPABILITIES / P5- Integration
of Superconducting Quantum Circuits
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
- _id: 2671EB66-B435-11E9-9278-68D0E5697425
name: Coherent on-chip conversion of superconducting qubit signals from microwaves
to optical frequencies
- _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: Nature Research
quality_controlled: '1'
related_material:
record:
- id: '18871'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Coherent optical control of a superconducting microwave cavity via electro-optical
dynamical back-action
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: 14
year: '2023'
...
---
OA_place: repository
_id: '18953'
abstract:
- lang: eng
text: The rapid development of superconducting quantum hardware is expected to run
into significant I/O restrictions due to the need for large-scale error correction
in a cryogenic environment. Classical data centers rely on fiber-optic interconnects
to remove similar networking bottlenecks and to allow for reconfigurable, software-defined
infrastructures. In the same spirit, ultra-cold electro-optic links have been
proposed and used to generate qubit control signals, or to replace cryogenic readout
electronics. So far, the latter suffered from either low efficiency, low bandwidth
and the need for additional microwave drives, or breaking of Cooper pairs and
qubit states. In this work we realize electro-optic microwave photonics at millikelvin
temperatures to implement a radio-over-fiber qubit readout that does not require
any active or passive cryogenic microwave equipment. We demonstrate all-optical
single-shot-readout by means of the Jaynes-Cummings nonlinearity in a circulator-free
readout scheme. Importantly, we do not observe any direct radiation impact on
the qubit state as verified with high-fidelity quantum-non-demolition measurements
despite the absence of shielding elements. This compatibility between superconducting
circuits and telecom wavelength light is not only a prerequisite to establish
modular quantum networks, it is also relevant for multiplexed readout of superconducting
photon detectors and classical superconducting logic. Moreover, this experiment
showcases the potential of electro-optic radiometry in harsh environments - an
electronics-free sensing principle that extends into the THz regime with applications
in radio astronomy, planetary missions and earth observation.
acknowledgement: "We thank F. Hassani and M. Zemlicka for assistance\r\nwith qubit
design and high power readout respectively,\r\nand P. Winkel and I. Pop at KIT for
providing the JPA.\r\nThis work was supported by the European Research\r\nCouncil
under grant agreement no. 758053 (ERC StG\r\nQUNNECT) and no. 101089099 (ERC CoG
cQEO), the\r\nEuropean Union’s Horizon 2020 research and innovation\r\nprogram under
grant agreement no. 899354 (FETopen\r\nSuperQuLAN) and the Austrian Science Fund
(FWF)\r\nthrough BeyondC (grant no. F7105). L.Q. acknowledges\r\ngenerous support
from the ISTFELLOW programme\r\nand G.A. is the recipient of a DOC fellowship of
the\r\nAustrian Academy of Sciences at IST Austria."
article_processing_charge: No
arxiv: 1
author:
- first_name: Georg M
full_name: Arnold, Georg M
id: 3770C838-F248-11E8-B48F-1D18A9856A87
last_name: Arnold
orcid: 0000-0003-1397-7876
- first_name: Thomas
full_name: Werner, Thomas
id: 1fcd8497-dba3-11ea-a45e-c6fbd715f7c7
last_name: Werner
orcid: 0009-0001-2346-5236
- first_name: Rishabh
full_name: Sahu, Rishabh
id: 47D26E34-F248-11E8-B48F-1D18A9856A87
last_name: Sahu
orcid: 0000-0001-6264-2162
- first_name: Lucky
full_name: Kapoor, Lucky
id: 84b9700b-15b2-11ec-abd3-831089e67615
last_name: Kapoor
orcid: 0000-0001-8319-2148
- first_name: Liu
full_name: Qiu, Liu
id: 45e99c0d-1eb1-11eb-9b96-ed8ab2983cac
last_name: Qiu
orcid: 0000-0003-4345-4267
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: Arnold GM, Werner T, Sahu R, Kapoor L, Qiu L, Fink JM. All-optical single-shot
readout of a superconducting qubit. arXiv. doi:10.48550/ARXIV.2310.16817
apa: Arnold, G. M., Werner, T., Sahu, R., Kapoor, L., Qiu, L., & Fink, J. M.
(n.d.). All-optical single-shot readout of a superconducting qubit. arXiv.
https://doi.org/10.48550/ARXIV.2310.16817
chicago: Arnold, Georg M, Thomas Werner, Rishabh Sahu, Lucky Kapoor, Liu Qiu, and
Johannes M Fink. “All-Optical Single-Shot Readout of a Superconducting Qubit.”
ArXiv, n.d. https://doi.org/10.48550/ARXIV.2310.16817.
ieee: G. M. Arnold, T. Werner, R. Sahu, L. Kapoor, L. Qiu, and J. M. Fink, “All-optical
single-shot readout of a superconducting qubit,” arXiv. .
ista: Arnold GM, Werner T, Sahu R, Kapoor L, Qiu L, Fink JM. All-optical single-shot
readout of a superconducting qubit. arXiv, 10.48550/ARXIV.2310.16817.
mla: Arnold, Georg M., et al. “All-Optical Single-Shot Readout of a Superconducting
Qubit.” ArXiv, doi:10.48550/ARXIV.2310.16817.
short: G.M. Arnold, T. Werner, R. Sahu, L. Kapoor, L. Qiu, J.M. Fink, ArXiv (n.d.).
corr_author: '1'
date_created: 2025-01-29T11:11:34Z
date_published: 2023-10-25T00:00:00Z
date_updated: 2026-07-05T22:30:25Z
day: '25'
department:
- _id: JoFi
doi: 10.48550/ARXIV.2310.16817
ec_funded: 1
external_id:
arxiv:
- '2310.16817'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2310.16817
month: '10'
oa: 1
oa_version: Preprint
project:
- _id: 26336814-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '758053'
name: A Fiber Optic Transceiver for Superconducting Qubits
- _id: bdadfa0d-d553-11ed-ba76-fb85edbd456a
grant_number: '101089099'
name: 'Cavity Quantum Electro Optics: Microwave photonics with nonclassical states'
- _id: 9B868D20-BA93-11EA-9121-9846C619BF3A
call_identifier: H2020
grant_number: '899354'
name: Quantum Local Area Networks with Superconducting Qubits
- _id: 2671EB66-B435-11E9-9278-68D0E5697425
name: Coherent on-chip conversion of superconducting qubit signals from microwaves
to optical frequencies
- _id: bdb108fd-d553-11ed-ba76-83dc74a9864f
grant_number: F07105
name: QUANTUM INFORMATION SYSTEMS BEYOND CLASSICAL CAPABILITIES / P5- Integration
of Superconducting Quantum Circuits
publication: arXiv
publication_status: draft
related_material:
record:
- id: '19073'
relation: later_version
status: public
- id: '18871'
relation: dissertation_contains
status: public
status: public
title: All-optical single-shot readout of a superconducting qubit
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: '13117'
abstract:
- lang: eng
text: The ability to control the direction of scattered light is crucial to provide
flexibility and scalability for a wide range of on-chip applications, such as
integrated photonics, quantum information processing, and nonlinear optics. Tunable
directionality can be achieved by applying external magnetic fields that modify
optical selection rules, by using nonlinear effects, or interactions with vibrations.
However, these approaches are less suitable to control microwave photon propagation
inside integrated superconducting quantum devices. Here, we demonstrate on-demand
tunable directional scattering based on two periodically modulated transmon qubits
coupled to a transmission line at a fixed distance. By changing the relative phase
between the modulation tones, we realize unidirectional forward or backward photon
scattering. Such an in-situ switchable mirror represents a versatile tool for
intra- and inter-chip microwave photonic processors. In the future, a lattice
of qubits can be used to realize topological circuits that exhibit strong nonreciprocity
or chirality.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: The authors thank W.D. Oliver for discussions, L. Drmic and P. Zielinski
for software development, and the MIBA workshop and the IST nanofabrication facility
for technical support. This work was supported by the Austrian Science Fund (FWF)
through BeyondC (F7105) and IST Austria. E.R. is the recipient of a DOC fellowship
of the Austrian Academy of Sciences at IST Austria. J.M.F. and M.Z. acknowledge
support from the European Research Council under grant agreement No 758053 (ERC
StG QUNNECT) and a NOMIS foundation research grant. The work of A.N.P. and A.V.P.
has been supported by the Russian Science Foundation under the grant No 20-12-00194.
article_number: '2998'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Elena
full_name: Redchenko, Elena
id: 2C21D6E8-F248-11E8-B48F-1D18A9856A87
last_name: Redchenko
- first_name: Alexander V.
full_name: Poshakinskiy, Alexander V.
last_name: Poshakinskiy
- first_name: Riya
full_name: Sett, Riya
id: 2E6D040E-F248-11E8-B48F-1D18A9856A87
last_name: Sett
orcid: 0000-0001-7641-8348
- first_name: Martin
full_name: Zemlicka, Martin
id: 2DCF8DE6-F248-11E8-B48F-1D18A9856A87
last_name: Zemlicka
orcid: 0009-0005-0878-3032
- first_name: Alexander N.
full_name: Poddubny, Alexander N.
last_name: Poddubny
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: Redchenko E, Poshakinskiy AV, Sett R, Zemlicka M, Poddubny AN, Fink JM. Tunable
directional photon scattering from a pair of superconducting qubits. Nature
Communications. 2023;14. doi:10.1038/s41467-023-38761-6
apa: Redchenko, E., Poshakinskiy, A. V., Sett, R., Zemlicka, M., Poddubny, A. N.,
& Fink, J. M. (2023). Tunable directional photon scattering from a pair of
superconducting qubits. Nature Communications. Springer Nature. https://doi.org/10.1038/s41467-023-38761-6
chicago: Redchenko, Elena, Alexander V. Poshakinskiy, Riya Sett, Martin Zemlicka,
Alexander N. Poddubny, and Johannes M Fink. “Tunable Directional Photon Scattering
from a Pair of Superconducting Qubits.” Nature Communications. Springer
Nature, 2023. https://doi.org/10.1038/s41467-023-38761-6.
ieee: E. Redchenko, A. V. Poshakinskiy, R. Sett, M. Zemlicka, A. N. Poddubny, and
J. M. Fink, “Tunable directional photon scattering from a pair of superconducting
qubits,” Nature Communications, vol. 14. Springer Nature, 2023.
ista: Redchenko E, Poshakinskiy AV, Sett R, Zemlicka M, Poddubny AN, Fink JM. 2023.
Tunable directional photon scattering from a pair of superconducting qubits. Nature
Communications. 14, 2998.
mla: Redchenko, Elena, et al. “Tunable Directional Photon Scattering from a Pair
of Superconducting Qubits.” Nature Communications, vol. 14, 2998, Springer
Nature, 2023, doi:10.1038/s41467-023-38761-6.
short: E. Redchenko, A.V. Poshakinskiy, R. Sett, M. Zemlicka, A.N. Poddubny, J.M.
Fink, Nature Communications 14 (2023).
corr_author: '1'
date_created: 2023-06-04T22:01:02Z
date_published: 2023-05-24T00:00:00Z
date_updated: 2026-07-05T22:30:30Z
day: '24'
ddc:
- '530'
department:
- _id: JoFi
doi: 10.1038/s41467-023-38761-6
ec_funded: 1
external_id:
arxiv:
- '2205.03293'
isi:
- '001001099700002'
pmid:
- '37225689'
file:
- access_level: open_access
checksum: a857df40f0882859c48a1ff1e2001ec2
content_type: application/pdf
creator: dernst
date_created: 2023-06-06T07:31:20Z
date_updated: 2023-06-06T07:31:20Z
file_id: '13123'
file_name: 2023_NaturePhysics_Redchenko.pdf
file_size: 1654389
relation: main_file
success: 1
file_date_updated: 2023-06-06T07:31:20Z
has_accepted_license: '1'
intvolume: ' 14'
isi: 1
language:
- iso: eng
month: '05'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 26336814-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '758053'
name: A Fiber Optic Transceiver for Superconducting Qubits
- _id: 26B354CA-B435-11E9-9278-68D0E5697425
name: Controllable Collective States of Superconducting Qubit Ensembles
- _id: eb9b30ac-77a9-11ec-83b8-871f581d53d2
name: Protected states of quantum matter
- _id: bdb108fd-d553-11ed-ba76-83dc74a9864f
grant_number: F07105
name: QUANTUM INFORMATION SYSTEMS BEYOND CLASSICAL CAPABILITIES / P5- Integration
of Superconducting Quantum Circuits
publication: Nature Communications
publication_identifier:
eissn:
- 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
record:
- id: '13124'
relation: research_data
status: public
- id: '19533'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Tunable directional photon scattering from a pair of superconducting 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: 14
year: '2023'
...
---
_id: '14032'
abstract:
- lang: eng
text: Arrays of Josephson junctions are governed by a competition between superconductivity
and repulsive Coulomb interactions, and are expected to exhibit diverging low-temperature
resistance when interactions exceed a critical level. Here we report a study of
the transport and microwave response of Josephson arrays with interactions exceeding
this level. Contrary to expectations, we observe that the array resistance drops
dramatically as the temperature is decreased—reminiscent of superconducting behaviour—and
then saturates at low temperature. Applying a magnetic field, we eventually observe
a transition to a highly resistive regime. These observations can be understood
within a theoretical picture that accounts for the effect of thermal fluctuations
on the insulating phase. On the basis of the agreement between experiment and
theory, we suggest that apparent superconductivity in our Josephson arrays arises
from melting the zero-temperature insulator.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: We thank D. Haviland, J. Pekola, C. Ciuti, A. Bubis and A. Shnirman
for helpful feedback on the paper. This research was supported by the Scientific
Service Units of IST Austria through resources provided by the MIBA Machine Shop
and the Nanofabrication Facility. Work supported by the Austrian FWF grant P33692-N
(S.M., J.S. and A.P.H.), the European Union’s Horizon 2020 Research and Innovation
programme under the Marie Skłodowska-Curie Grant Agreement No. 754411 (J.S.) and
a NOMIS foundation research grant (J.M.F. and A.P.H.).
article_processing_charge: Yes (in subscription journal)
article_type: original
author:
- first_name: Soham
full_name: Mukhopadhyay, Soham
id: FDE60288-A89D-11E9-947F-1AF6E5697425
last_name: Mukhopadhyay
orcid: 0000-0001-5263-5559
- first_name: Jorden L
full_name: Senior, Jorden L
id: 5479D234-2D30-11EA-89CC-40953DDC885E
last_name: Senior
orcid: 0000-0002-0672-9295
- first_name: Jaime
full_name: Saez Mollejo, Jaime
id: e0390f72-f6e0-11ea-865d-862393336714
last_name: Saez Mollejo
- first_name: Denise
full_name: Puglia, Denise
id: 4D495994-AE37-11E9-AC72-31CAE5697425
last_name: Puglia
orcid: 0000-0003-1144-2763
- first_name: Martin
full_name: Zemlicka, Martin
id: 2DCF8DE6-F248-11E8-B48F-1D18A9856A87
last_name: Zemlicka
orcid: 0009-0005-0878-3032
- 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: Andrew P
full_name: Higginbotham, Andrew P
id: 4AD6785A-F248-11E8-B48F-1D18A9856A87
last_name: Higginbotham
orcid: 0000-0003-2607-2363
citation:
ama: Mukhopadhyay S, Senior JL, Saez Mollejo J, et al. Superconductivity from a
melted insulator in Josephson junction arrays. Nature Physics. 2023;19:1630-1635.
doi:10.1038/s41567-023-02161-w
apa: Mukhopadhyay, S., Senior, J. L., Saez Mollejo, J., Puglia, D., Zemlicka, M.,
Fink, J. M., & Higginbotham, A. P. (2023). Superconductivity from a melted
insulator in Josephson junction arrays. Nature Physics. Springer Nature.
https://doi.org/10.1038/s41567-023-02161-w
chicago: Mukhopadhyay, Soham, Jorden L Senior, Jaime Saez Mollejo, Denise Puglia,
Martin Zemlicka, Johannes M Fink, and Andrew P Higginbotham. “Superconductivity
from a Melted Insulator in Josephson Junction Arrays.” Nature Physics.
Springer Nature, 2023. https://doi.org/10.1038/s41567-023-02161-w.
ieee: S. Mukhopadhyay et al., “Superconductivity from a melted insulator
in Josephson junction arrays,” Nature Physics, vol. 19. Springer Nature,
pp. 1630–1635, 2023.
ista: Mukhopadhyay S, Senior JL, Saez Mollejo J, Puglia D, Zemlicka M, Fink JM,
Higginbotham AP. 2023. Superconductivity from a melted insulator in Josephson
junction arrays. Nature Physics. 19, 1630–1635.
mla: Mukhopadhyay, Soham, et al. “Superconductivity from a Melted Insulator in Josephson
Junction Arrays.” Nature Physics, vol. 19, Springer Nature, 2023, pp. 1630–35,
doi:10.1038/s41567-023-02161-w.
short: S. Mukhopadhyay, J.L. Senior, J. Saez Mollejo, D. Puglia, M. Zemlicka, J.M.
Fink, A.P. Higginbotham, Nature Physics 19 (2023) 1630–1635.
corr_author: '1'
date_created: 2023-08-11T07:41:17Z
date_published: 2023-11-01T00:00:00Z
date_updated: 2026-07-05T22:30:53Z
day: '01'
ddc:
- '530'
department:
- _id: GradSch
- _id: AnHi
- _id: JoFi
doi: 10.1038/s41567-023-02161-w
ec_funded: 1
external_id:
isi:
- '001054563800006'
file:
- access_level: open_access
checksum: 1fc86d71bfbf836e221c1e925343adc5
content_type: application/pdf
creator: dernst
date_created: 2024-01-29T11:25:38Z
date_updated: 2024-01-29T11:25:38Z
file_id: '14899'
file_name: 2023_NaturePhysics_Mukhopadhyay.pdf
file_size: 1977706
relation: main_file
success: 1
file_date_updated: 2024-01-29T11:25:38Z
has_accepted_license: '1'
intvolume: ' 19'
isi: 1
keyword:
- General Physics and Astronomy
language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
page: 1630-1635
project:
- _id: 0aa3608a-070f-11eb-9043-e9cd8a2bd931
grant_number: P33692
name: Cavity electromechanics across a quantum phase transition
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
- _id: eb9b30ac-77a9-11ec-83b8-871f581d53d2
name: Protected states of quantum matter
publication: Nature Physics
publication_identifier:
eissn:
- 1745-2481
issn:
- 1745-2473
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
record:
- id: '17881'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Superconductivity from a melted insulator in Josephson junction arrays
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: 19
year: '2023'
...
---
_id: '10940'
abstract:
- lang: eng
text: 'Magnetic-field-resilient superconducting circuits enable sensing applications
and hybrid quantum computing architectures involving spin or topological qubits
and electromechanical elements, as well as studying flux noise and quasiparticle
loss. We investigate the effect of in-plane magnetic fields up to 1 T on the spectrum
and coherence times of thin-film three-dimensional aluminum transmons. Using a
copper cavity, unaffected by strong magnetic fields, we can probe solely the effect
of magnetic fields on the transmons. We present data on a single-junction and
a superconducting-quantum-interference-device (SQUID) transmon that are cooled
down in the same cavity. As expected, the transmon frequencies decrease with increasing
field, due to suppression of the superconducting gap and a geometric Fraunhofer-like
contribution. Nevertheless, the thin-film transmons show strong magnetic field
resilience: both transmons display microsecond coherence up to at least 0.65 T,
and T1 remains above 1μs over the entire measurable range. SQUID spectroscopy
is feasible up to 1 T, the limit of our magnet. We conclude that thin-film aluminum
Josephson junctions are suitable hardware for superconducting circuits in the
high-magnetic-field regime.'
acknowledgement: "We would like to thank Ida Milow for her internship in the laboratory
and contributions to our code base. We thank T. Zent and L. Hamdan for technical
assistance, and D. Fan for help with setting up the aluminum evaporator. We thank
A. Salari, M. Rößler, S. Barzanjeh, M. Zemlicka, F. Hassani, and M. Peruzzo for
contributions in the early stages of the experiments. This project has received
funding from the European Research Council (ERC) under the European Union’s Horizon
2020 research and innovation program (Grant Agreement No. 741121) and was also funded
by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under CRC
1238 – 277146847 (Subproject B01), as well as under Germany’s Excellence Strategy
– Cluster of Excellence Matter and Light for Quantum Computing (ML4Q), EXC 2004/1\r\n–
390534769."
article_number: '034032'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: J.
full_name: Krause, J.
last_name: Krause
- first_name: C.
full_name: Dickel, C.
last_name: Dickel
- first_name: E.
full_name: Vaal, E.
last_name: Vaal
- first_name: M.
full_name: Vielmetter, M.
last_name: Vielmetter
- first_name: J.
full_name: Feng, J.
last_name: Feng
- first_name: R.
full_name: Bounds, R.
last_name: Bounds
- first_name: G.
full_name: Catelani, G.
last_name: Catelani
- 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: Yoichi
full_name: Ando, Yoichi
last_name: Ando
citation:
ama: Krause J, Dickel C, Vaal E, et al. Magnetic field resilience of three-dimensional
transmons with thin-film Al/AlOx/Al Josephson junctions approaching 1 T. Physical
Review Applied. 2022;17(3). doi:10.1103/PhysRevApplied.17.034032
apa: Krause, J., Dickel, C., Vaal, E., Vielmetter, M., Feng, J., Bounds, R., … Ando,
Y. (2022). Magnetic field resilience of three-dimensional transmons with thin-film
Al/AlOx/Al Josephson junctions approaching 1 T. Physical Review Applied.
American Physical Society. https://doi.org/10.1103/PhysRevApplied.17.034032
chicago: Krause, J., C. Dickel, E. Vaal, M. Vielmetter, J. Feng, R. Bounds, G. Catelani,
Johannes M Fink, and Yoichi Ando. “Magnetic Field Resilience of Three-Dimensional
Transmons with Thin-Film Al/AlOx/Al Josephson Junctions Approaching 1 T.” Physical
Review Applied. American Physical Society, 2022. https://doi.org/10.1103/PhysRevApplied.17.034032.
ieee: J. Krause et al., “Magnetic field resilience of three-dimensional transmons
with thin-film Al/AlOx/Al Josephson junctions approaching 1 T,” Physical Review
Applied, vol. 17, no. 3. American Physical Society, 2022.
ista: Krause J, Dickel C, Vaal E, Vielmetter M, Feng J, Bounds R, Catelani G, Fink
JM, Ando Y. 2022. Magnetic field resilience of three-dimensional transmons with
thin-film Al/AlOx/Al Josephson junctions approaching 1 T. Physical Review Applied.
17(3), 034032.
mla: Krause, J., et al. “Magnetic Field Resilience of Three-Dimensional Transmons
with Thin-Film Al/AlOx/Al Josephson Junctions Approaching 1 T.” Physical Review
Applied, vol. 17, no. 3, 034032, American Physical Society, 2022, doi:10.1103/PhysRevApplied.17.034032.
short: J. Krause, C. Dickel, E. Vaal, M. Vielmetter, J. Feng, R. Bounds, G. Catelani,
J.M. Fink, Y. Ando, Physical Review Applied 17 (2022).
date_created: 2022-04-03T22:01:43Z
date_published: 2022-03-11T00:00:00Z
date_updated: 2023-08-03T06:23:58Z
day: '11'
department:
- _id: JoFi
doi: 10.1103/PhysRevApplied.17.034032
external_id:
arxiv:
- '2111.01115'
isi:
- '000770371400003'
intvolume: ' 17'
isi: 1
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2111.01115
month: '03'
oa: 1
oa_version: Preprint
publication: Physical Review Applied
publication_identifier:
eissn:
- 2331-7019
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Magnetic field resilience of three-dimensional transmons with thin-film Al/AlOx/Al
Josephson junctions approaching 1 T
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 17
year: '2022'
...
---
_id: '11417'
abstract:
- lang: eng
text: "Over the past few years, the field of quantum information science has seen
tremendous progress toward realizing large-scale quantum computers. With demonstrations
of quantum computers outperforming classical computers for a select range of problems,1–3
we have finally entered the noisy, intermediate-scale quantum (NISQ) computing
era. While the quantum computers of today are technological marvels, they are
not yet error corrected, and it is unclear whether any system will scale beyond
a few hundred logical qubits without significant changes to architecture and control
schemes. Today's quantum systems are analogous to the ENIAC (Electronic Numerical
Integrator And Computer) and EDVAC (Electronic Discrete Variable Automatic Computer)
systems of the 1940s, which ran on vacuum tubes. These machines were built on
a solid, nominally scalable architecture and when they were developed, nobody
could have predicted the development of the transistor and the impact of the resulting
semiconductor industry. Simply put, the computers of today are nothing like the
early computers of the 1940s. We believe that the qubits of future fault-tolerant
quantum systems will look quite different from the qubits of the NISQ machines
in operation today. This Special Topic issue is devoted to new and emerging quantum
systems with a focus on enabling technologies that can eventually lead to the
quantum analog to the transistor. We have solicited both research4–18 and perspective
articles19–21 to discuss new and emerging qubit systems with a focus on novel
materials, encodings, and architectures. We are proud to present a collection
that touches on a wide range of technologies including superconductors,7–13,21
semiconductors,15–17,19 and individual atomic qubits.18\r\n"
acknowledgement: "We would like to thank all of the authors who contributed to\r\nthis
Special Topic. We would also like to thank the editorial team at\r\nAPL including
Jessica Trudeau, Emma Van Burns, Martin Weides,\r\nand Lesley Cohen."
article_number: '190401'
article_processing_charge: No
article_type: letter_note
author:
- first_name: Anthony J.
full_name: Sigillito, Anthony J.
last_name: Sigillito
- first_name: Jacob P.
full_name: Covey, Jacob P.
last_name: Covey
- 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: Karl
full_name: Petersson, Karl
last_name: Petersson
- first_name: Stefan
full_name: Preble, Stefan
last_name: Preble
citation:
ama: 'Sigillito AJ, Covey JP, Fink JM, Petersson K, Preble S. Emerging qubit systems:
Guest editorial. Applied Physics Letters. 2022;120(19). doi:10.1063/5.0097339'
apa: 'Sigillito, A. J., Covey, J. P., Fink, J. M., Petersson, K., & Preble,
S. (2022). Emerging qubit systems: Guest editorial. Applied Physics Letters.
American Institute of Physics. https://doi.org/10.1063/5.0097339'
chicago: 'Sigillito, Anthony J., Jacob P. Covey, Johannes M Fink, Karl Petersson,
and Stefan Preble. “Emerging Qubit Systems: Guest Editorial.” Applied Physics
Letters. American Institute of Physics, 2022. https://doi.org/10.1063/5.0097339.'
ieee: 'A. J. Sigillito, J. P. Covey, J. M. Fink, K. Petersson, and S. Preble, “Emerging
qubit systems: Guest editorial,” Applied Physics Letters, vol. 120, no.
19. American Institute of Physics, 2022.'
ista: 'Sigillito AJ, Covey JP, Fink JM, Petersson K, Preble S. 2022. Emerging qubit
systems: Guest editorial. Applied Physics Letters. 120(19), 190401.'
mla: 'Sigillito, Anthony J., et al. “Emerging Qubit Systems: Guest Editorial.” Applied
Physics Letters, vol. 120, no. 19, 190401, American Institute of Physics,
2022, doi:10.1063/5.0097339.'
short: A.J. Sigillito, J.P. Covey, J.M. Fink, K. Petersson, S. Preble, Applied Physics
Letters 120 (2022).
date_created: 2022-05-29T22:01:53Z
date_published: 2022-05-12T00:00:00Z
date_updated: 2026-06-18T17:14:33Z
day: '12'
ddc:
- '530'
department:
- _id: JoFi
doi: 10.1063/5.0097339
external_id:
isi:
- '000796002100002'
intvolume: ' 120'
isi: 1
issue: '19'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1063/5.0097339
month: '05'
oa: 1
oa_version: Published Version
publication: Applied Physics Letters
publication_identifier:
issn:
- 0003-6951
publication_status: published
publisher: American Institute of Physics
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Emerging qubit systems: Guest editorial'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 120
year: '2022'
...
---
_id: '11591'
abstract:
- lang: eng
text: We investigate the deterministic generation and distribution of entanglement
in large quantum networks by driving distant qubits with the output fields of
a nondegenerate parametric amplifier. In this setting, the amplifier produces
a continuous Gaussian two-mode squeezed state, which acts as a quantum-correlated
reservoir for the qubits and relaxes them into a highly entangled steady state.
Here we are interested in the maximal amount of entanglement and the optimal entanglement
generation rates that can be achieved with this scheme under realistic conditions
taking, in particular, the finite amplifier bandwidth, waveguide losses, and propagation
delays into account. By combining exact numerical simulations of the full network
with approximate analytic results, we predict the optimal working point for the
amplifier and the corresponding qubit-qubit entanglement under various conditions.
Our findings show that this passive conversion of Gaussian into discrete-variable
entanglement offers a robust and experimentally very attractive approach for operating
large optical, microwave, or hybrid quantum networks, for which efficient parametric
amplifiers are currently developed.
acknowledgement: We thank T. Mavrogordatos and D. Zhu for initial contribution on
the presented topic and K. Fedorov for stimulating discussions on entangled microwave
beams. This work was supported by the Austrian Science Fund (FWF) through Grant
No. P32299 (PHONED) and the European Union’s Horizon 2020 research and innovation
programme under Grant Agreement No. 899354 (SuperQuLAN). Most of the computational
results presented were obtained using the CLIP cluster [65].
article_number: '062454'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: J.
full_name: Agustí, J.
last_name: Agustí
- first_name: Y.
full_name: Minoguchi, Y.
last_name: Minoguchi
- 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: P.
full_name: Rabl, P.
last_name: Rabl
citation:
ama: Agustí J, Minoguchi Y, Fink JM, Rabl P. Long-distance distribution of qubit-qubit
entanglement using Gaussian-correlated photonic beams. Physical Review A.
2022;105(6). doi:10.1103/PhysRevA.105.062454
apa: Agustí, J., Minoguchi, Y., Fink, J. M., & Rabl, P. (2022). Long-distance
distribution of qubit-qubit entanglement using Gaussian-correlated photonic beams.
Physical Review A. American Physical Society. https://doi.org/10.1103/PhysRevA.105.062454
chicago: Agustí, J., Y. Minoguchi, Johannes M Fink, and P. Rabl. “Long-Distance
Distribution of Qubit-Qubit Entanglement Using Gaussian-Correlated Photonic Beams.”
Physical Review A. American Physical Society, 2022. https://doi.org/10.1103/PhysRevA.105.062454.
ieee: J. Agustí, Y. Minoguchi, J. M. Fink, and P. Rabl, “Long-distance distribution
of qubit-qubit entanglement using Gaussian-correlated photonic beams,” Physical
Review A, vol. 105, no. 6. American Physical Society, 2022.
ista: Agustí J, Minoguchi Y, Fink JM, Rabl P. 2022. Long-distance distribution of
qubit-qubit entanglement using Gaussian-correlated photonic beams. Physical Review
A. 105(6), 062454.
mla: Agustí, J., et al. “Long-Distance Distribution of Qubit-Qubit Entanglement
Using Gaussian-Correlated Photonic Beams.” Physical Review A, vol. 105,
no. 6, 062454, American Physical Society, 2022, doi:10.1103/PhysRevA.105.062454.
short: J. Agustí, Y. Minoguchi, J.M. Fink, P. Rabl, Physical Review A 105 (2022).
date_created: 2022-07-17T22:01:55Z
date_published: 2022-06-29T00:00:00Z
date_updated: 2025-04-14T07:53:28Z
day: '29'
department:
- _id: JoFi
doi: 10.1103/PhysRevA.105.062454
ec_funded: 1
external_id:
arxiv:
- '2204.02993'
isi:
- '000824330200003'
intvolume: ' 105'
isi: 1
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.2204.02993'
month: '06'
oa: 1
oa_version: Preprint
project:
- _id: 9B868D20-BA93-11EA-9121-9846C619BF3A
call_identifier: H2020
grant_number: '899354'
name: Quantum Local Area Networks with Superconducting Qubits
publication: Physical Review A
publication_identifier:
eissn:
- 2469-9934
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Long-distance distribution of qubit-qubit entanglement using Gaussian-correlated
photonic beams
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 105
year: '2022'
...
---
_id: '12088'
abstract:
- lang: eng
text: We present a quantum-enabled microwave-telecom interface with bidirectional
conversion efficiencies up to 15% and added input noise quanta as low as 0.16.
Moreover, we observe evidence for electro-optic laser cooling and vacuum amplification.
article_number: FW4D.4
article_processing_charge: No
author:
- first_name: Rishabh
full_name: Sahu, Rishabh
id: 47D26E34-F248-11E8-B48F-1D18A9856A87
last_name: Sahu
orcid: 0000-0001-6264-2162
- first_name: William J
full_name: Hease, William J
id: 29705398-F248-11E8-B48F-1D18A9856A87
last_name: Hease
orcid: 0000-0001-9868-2166
- first_name: Alfredo R
full_name: Rueda Sanchez, Alfredo R
id: 3B82B0F8-F248-11E8-B48F-1D18A9856A87
last_name: Rueda Sanchez
orcid: 0000-0001-6249-5860
- first_name: Georg M
full_name: Arnold, Georg M
id: 3770C838-F248-11E8-B48F-1D18A9856A87
last_name: Arnold
orcid: 0000-0003-1397-7876
- first_name: Liu
full_name: Qiu, Liu
id: 45e99c0d-1eb1-11eb-9b96-ed8ab2983cac
last_name: Qiu
orcid: 0000-0003-4345-4267
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: 'Sahu R, Hease WJ, Rueda Sanchez AR, Arnold GM, Qiu L, Fink JM. Realizing a
quantum-enabled interconnect between microwave and telecom light. In: Conference
on Lasers and Electro-Optics. Optica Publishing Group; 2022. doi:10.1364/CLEO_QELS.2022.FW4D.4'
apa: 'Sahu, R., Hease, W. J., Rueda Sanchez, A. R., Arnold, G. M., Qiu, L., &
Fink, J. M. (2022). Realizing a quantum-enabled interconnect between microwave
and telecom light. In Conference on Lasers and Electro-Optics. San Jose,
CA, United States: Optica Publishing Group. https://doi.org/10.1364/CLEO_QELS.2022.FW4D.4'
chicago: Sahu, Rishabh, William J Hease, Alfredo R Rueda Sanchez, Georg M Arnold,
Liu Qiu, and Johannes M Fink. “Realizing a Quantum-Enabled Interconnect between
Microwave and Telecom Light.” In Conference on Lasers and Electro-Optics.
Optica Publishing Group, 2022. https://doi.org/10.1364/CLEO_QELS.2022.FW4D.4.
ieee: R. Sahu, W. J. Hease, A. R. Rueda Sanchez, G. M. Arnold, L. Qiu, and J. M.
Fink, “Realizing a quantum-enabled interconnect between microwave and telecom
light,” in Conference on Lasers and Electro-Optics, San Jose, CA, United
States, 2022.
ista: 'Sahu R, Hease WJ, Rueda Sanchez AR, Arnold GM, Qiu L, Fink JM. 2022. Realizing
a quantum-enabled interconnect between microwave and telecom light. Conference
on Lasers and Electro-Optics. CLEO: QELS Fundamental Science, FW4D.4.'
mla: Sahu, Rishabh, et al. “Realizing a Quantum-Enabled Interconnect between Microwave
and Telecom Light.” Conference on Lasers and Electro-Optics, FW4D.4, Optica
Publishing Group, 2022, doi:10.1364/CLEO_QELS.2022.FW4D.4.
short: R. Sahu, W.J. Hease, A.R. Rueda Sanchez, G.M. Arnold, L. Qiu, J.M. Fink,
in:, Conference on Lasers and Electro-Optics, Optica Publishing Group, 2022.
conference:
end_date: 2022-05-20
location: San Jose, CA, United States
name: 'CLEO: QELS Fundamental Science'
start_date: 2022-05-15
corr_author: '1'
date_created: 2022-09-11T22:01:58Z
date_published: 2022-05-01T00:00:00Z
date_updated: 2024-10-09T21:03:27Z
day: '01'
department:
- _id: JoFi
doi: 10.1364/CLEO_QELS.2022.FW4D.4
language:
- iso: eng
month: '05'
oa_version: None
publication: Conference on Lasers and Electro-Optics
publication_identifier:
isbn:
- '9781557528209'
publication_status: published
publisher: Optica Publishing Group
quality_controlled: '1'
scopus_import: '1'
status: public
title: Realizing a quantum-enabled interconnect between microwave and telecom light
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2022'
...
---
_id: '14520'
abstract:
- lang: eng
text: 'This dataset comprises all data shown in the figures of the submitted article
"Compact vacuum gap transmon qubits: Selective and sensitive probes for superconductor
surface losses" at arxiv.org/abs/2206.14104. Additional raw data are available
from the corresponding author on reasonable request.'
article_processing_charge: No
author:
- first_name: Martin
full_name: Zemlicka, Martin
id: 2DCF8DE6-F248-11E8-B48F-1D18A9856A87
last_name: Zemlicka
orcid: 0009-0005-0878-3032
- first_name: Elena
full_name: Redchenko, Elena
id: 2C21D6E8-F248-11E8-B48F-1D18A9856A87
last_name: Redchenko
- first_name: Matilda
full_name: Peruzzo, Matilda
id: 3F920B30-F248-11E8-B48F-1D18A9856A87
last_name: Peruzzo
orcid: 0000-0002-3415-4628
- first_name: Farid
full_name: Hassani, Farid
id: 2AED110C-F248-11E8-B48F-1D18A9856A87
last_name: Hassani
orcid: 0000-0001-6937-5773
- first_name: Andrea
full_name: Trioni, Andrea
id: 42F71B44-F248-11E8-B48F-1D18A9856A87
last_name: Trioni
- first_name: Shabir
full_name: Barzanjeh, Shabir
id: 2D25E1F6-F248-11E8-B48F-1D18A9856A87
last_name: Barzanjeh
orcid: 0000-0003-0415-1423
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: 'Zemlicka M, Redchenko E, Peruzzo M, et al. Compact vacuum gap transmon qubits:
Selective and sensitive probes for superconductor surface losses. 2022. doi:10.5281/ZENODO.8408897'
apa: 'Zemlicka, M., Redchenko, E., Peruzzo, M., Hassani, F., Trioni, A., Barzanjeh,
S., & Fink, J. M. (2022). Compact vacuum gap transmon qubits: Selective and
sensitive probes for superconductor surface losses. Zenodo. https://doi.org/10.5281/ZENODO.8408897'
chicago: 'Zemlicka, Martin, Elena Redchenko, Matilda Peruzzo, Farid Hassani, Andrea
Trioni, Shabir Barzanjeh, and Johannes M Fink. “Compact Vacuum Gap Transmon Qubits:
Selective and Sensitive Probes for Superconductor Surface Losses.” Zenodo, 2022.
https://doi.org/10.5281/ZENODO.8408897.'
ieee: 'M. Zemlicka et al., “Compact vacuum gap transmon qubits: Selective
and sensitive probes for superconductor surface losses.” Zenodo, 2022.'
ista: 'Zemlicka M, Redchenko E, Peruzzo M, Hassani F, Trioni A, Barzanjeh S, Fink
JM. 2022. Compact vacuum gap transmon qubits: Selective and sensitive probes for
superconductor surface losses, Zenodo, 10.5281/ZENODO.8408897.'
mla: 'Zemlicka, Martin, et al. Compact Vacuum Gap Transmon Qubits: Selective
and Sensitive Probes for Superconductor Surface Losses. Zenodo, 2022, doi:10.5281/ZENODO.8408897.'
short: M. Zemlicka, E. Redchenko, M. Peruzzo, F. Hassani, A. Trioni, S. Barzanjeh,
J.M. Fink, (2022).
corr_author: '1'
date_created: 2023-11-13T08:09:10Z
date_published: 2022-06-28T00:00:00Z
date_updated: 2026-06-03T07:16:02Z
day: '28'
ddc:
- '530'
department:
- _id: JoFi
doi: 10.5281/ZENODO.8408897
has_accepted_license: '1'
main_file_link:
- open_access: '1'
url: https://doi.org/10.5281/ZENODO.8408897
month: '06'
oa: 1
oa_version: Published Version
publisher: Zenodo
related_material:
record:
- id: '14517'
relation: used_in_publication
status: public
status: public
title: 'Compact vacuum gap transmon qubits: Selective and sensitive probes for superconductor
surface losses'
tmp:
image: /images/cc_0.png
legal_code_url: https://creativecommons.org/publicdomain/zero/1.0/legalcode
name: Creative Commons Public Domain Dedication (CC0 1.0)
short: CC0 (1.0)
type: research_data_reference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2022'
...