---
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. <i>arXiv</i>. doi:<a href="https://doi.org/10.48550/ARXIV.2310.16817">10.48550/ARXIV.2310.16817</a>
  apa: Arnold, G. M., Werner, T., Sahu, R., Kapoor, L., Qiu, L., &#38; Fink, J. M.
    (n.d.). All-optical single-shot readout of a superconducting qubit. <i>arXiv</i>.
    <a href="https://doi.org/10.48550/ARXIV.2310.16817">https://doi.org/10.48550/ARXIV.2310.16817</a>
  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.”
    <i>ArXiv</i>, n.d. <a href="https://doi.org/10.48550/ARXIV.2310.16817">https://doi.org/10.48550/ARXIV.2310.16817</a>.
  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,” <i>arXiv</i>. .
  ista: Arnold GM, Werner T, Sahu R, Kapoor L, Qiu L, Fink JM. All-optical single-shot
    readout of a superconducting qubit. arXiv, <a href="https://doi.org/10.48550/ARXIV.2310.16817">10.48550/ARXIV.2310.16817</a>.
  mla: Arnold, Georg M., et al. “All-Optical Single-Shot Readout of a Superconducting
    Qubit.” <i>ArXiv</i>, doi:<a href="https://doi.org/10.48550/ARXIV.2310.16817">10.48550/ARXIV.2310.16817</a>.
  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: 2026-11-09T23:30:28Z
day: '25'
department:
- _id: JoFi
doi: 10.48550/ARXIV.2310.16817
ec_funded: 1
external_id:
  arxiv:
  - '2310.16817'
fulldoi: https://doi.org/10.48550/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: '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. <i>Nature Physics</i>. 2023;19:1630-1635.
    doi:<a href="https://doi.org/10.1038/s41567-023-02161-w">10.1038/s41567-023-02161-w</a>
  apa: Mukhopadhyay, S., Senior, J. L., Saez Mollejo, J., Puglia, D., Zemlicka, M.,
    Fink, J. M., &#38; Higginbotham, A. P. (2023). Superconductivity from a melted
    insulator in Josephson junction arrays. <i>Nature Physics</i>. Springer Nature.
    <a href="https://doi.org/10.1038/s41567-023-02161-w">https://doi.org/10.1038/s41567-023-02161-w</a>
  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.” <i>Nature Physics</i>.
    Springer Nature, 2023. <a href="https://doi.org/10.1038/s41567-023-02161-w">https://doi.org/10.1038/s41567-023-02161-w</a>.
  ieee: S. Mukhopadhyay <i>et al.</i>, “Superconductivity from a melted insulator
    in Josephson junction arrays,” <i>Nature Physics</i>, 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.” <i>Nature Physics</i>, vol. 19, Springer Nature, 2023, pp. 1630–35,
    doi:<a href="https://doi.org/10.1038/s41567-023-02161-w">10.1038/s41567-023-02161-w</a>.
  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: 2026-11-09T23:31:01Z
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:
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  date_created: 2024-01-29T11:25:38Z
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  file_size: 1977706
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file_date_updated: 2024-01-29T11:25:38Z
fulldoi: https://doi.org/10.1038/s41567-023-02161-w
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:
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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: '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. <i>Nature
    Communications</i>. 2023;14. doi:<a href="https://doi.org/10.1038/s41467-023-38761-6">10.1038/s41467-023-38761-6</a>
  apa: Redchenko, E., Poshakinskiy, A. V., Sett, R., Zemlicka, M., Poddubny, A. N.,
    &#38; Fink, J. M. (2023). Tunable directional photon scattering from a pair of
    superconducting qubits. <i>Nature Communications</i>. Springer Nature. <a href="https://doi.org/10.1038/s41467-023-38761-6">https://doi.org/10.1038/s41467-023-38761-6</a>
  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.” <i>Nature Communications</i>. Springer
    Nature, 2023. <a href="https://doi.org/10.1038/s41467-023-38761-6">https://doi.org/10.1038/s41467-023-38761-6</a>.
  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,” <i>Nature Communications</i>, 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.” <i>Nature Communications</i>, vol. 14, 2998, Springer
    Nature, 2023, doi:<a href="https://doi.org/10.1038/s41467-023-38761-6">10.1038/s41467-023-38761-6</a>.
  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: 2026-11-09T23:31:09Z
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
fulldoi: https://doi.org/10.1038/s41467-023-38761-6
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:
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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: '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. <i>Physical
    Review Applied</i>. 2022;17(3). doi:<a href="https://doi.org/10.1103/PhysRevApplied.17.034032">10.1103/PhysRevApplied.17.034032</a>
  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. <i>Physical Review Applied</i>.
    American Physical Society. <a href="https://doi.org/10.1103/PhysRevApplied.17.034032">https://doi.org/10.1103/PhysRevApplied.17.034032</a>
  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.” <i>Physical
    Review Applied</i>. American Physical Society, 2022. <a href="https://doi.org/10.1103/PhysRevApplied.17.034032">https://doi.org/10.1103/PhysRevApplied.17.034032</a>.
  ieee: J. Krause <i>et al.</i>, “Magnetic field resilience of three-dimensional transmons
    with thin-film Al/AlOx/Al Josephson junctions approaching 1 T,” <i>Physical Review
    Applied</i>, 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.” <i>Physical Review
    Applied</i>, vol. 17, no. 3, 034032, American Physical Society, 2022, doi:<a href="https://doi.org/10.1103/PhysRevApplied.17.034032">10.1103/PhysRevApplied.17.034032</a>.
  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'
fulldoi: https://doi.org/10.1103/PhysRevApplied.17.034032
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: '11353'
abstract:
- lang: eng
  text: Micro- and nanoscale optical or microwave cavities are used in a wide range
    of classical applications and quantum science experiments, ranging from precision
    measurements, laser technologies to quantum control of mechanical motion. The
    dissipative photon loss via absorption, present to some extent in any optical
    cavity, is known to introduce thermo-optical effects and thereby impose fundamental
    limits on precision measurements. Here, we theoretically and experimentally reveal
    that such dissipative photon absorption can result in quantum feedback via in-loop
    field detection of the absorbed optical field, leading to the intracavity field
    fluctuations to be squashed or antisquashed. A closed-loop dissipative quantum
    feedback to the cavity field arises. Strikingly, this modifies the optical cavity
    susceptibility in coherent response measurements (capable of both increasing or
    decreasing the bare cavity linewidth) and causes excess noise and correlations
    in incoherent interferometric optomechanical measurements using a cavity, that
    is parametrically coupled to a mechanical oscillator. We experimentally observe
    such unanticipated dissipative dynamics in optomechanical spectroscopy of sideband-cooled
    optomechanical crystal cavitiess at both cryogenic temperature (approximately
    8 K) and ambient conditions. The dissipative feedback introduces effective modifications
    to the optical cavity linewidth and the optomechanical scattering rate and gives
    rise to excess imprecision noise in the interferometric quantum measurement of
    mechanical motion. Such dissipative feedback differs fundamentally from a quantum
    nondemolition feedback, e.g., optical Kerr squeezing. The dissipative feedback
    itself always results in an antisqueezed out-of-loop optical field, while it can
    enhance the coexisting Kerr squeezing under certain conditions. Our result applies
    to cavity spectroscopy in both optical and superconducting microwave cavities,
    and equally applies to any dissipative feedback mechanism of different bandwidth
    inside the cavity. It has wide-ranging implications for future dissipation engineering,
    such as dissipation enhanced sideband cooling and Kerr squeezing, quantum frequency
    conversion, and nonreciprocity in photonic systems.
acknowledgement: "L.Q. acknowledges fruitful discussions with D. Vitali, R. Schnabel,
  P.K. Lam, A. Nunnenkamp, and D. Malz. This work is supported by the EUH2020 research
  and innovation programme under Grant No. 732894 (FET Proactive HOT), and the European
  Research Council through \r\nGrant No. 835329 (ExCOM-cCEO). This work was further
  supported by Swiss National Science Foundation under Grant Agreements No. 185870
  (Ambizione) and No. 204927. Samples were fabricated at the Center of MicroNanoTechnology
  (CMi) at EPFL and the Binnig and Rohrer Nanotechnology Center at IBM Research-Zurich."
article_number: '020309'
article_processing_charge: No
article_type: original
author:
- first_name: Liu
  full_name: Qiu, Liu
  id: 45e99c0d-1eb1-11eb-9b96-ed8ab2983cac
  last_name: Qiu
  orcid: 0000-0003-4345-4267
- first_name: Guanhao
  full_name: Huang, Guanhao
  last_name: Huang
- first_name: Itay
  full_name: Shomroni, Itay
  last_name: Shomroni
- first_name: Jiahe
  full_name: Pan, Jiahe
  last_name: Pan
- first_name: Paul
  full_name: Seidler, Paul
  last_name: Seidler
- first_name: Tobias J.
  full_name: Kippenberg, Tobias J.
  last_name: Kippenberg
citation:
  ama: Qiu L, Huang G, Shomroni I, Pan J, Seidler P, Kippenberg TJ. Dissipative quantum
    feedback in measurements using a parametrically coupled microcavity. <i>PRX Quantum</i>.
    2022;3(2). doi:<a href="https://doi.org/10.1103/PRXQuantum.3.020309">10.1103/PRXQuantum.3.020309</a>
  apa: Qiu, L., Huang, G., Shomroni, I., Pan, J., Seidler, P., &#38; Kippenberg, T.
    J. (2022). Dissipative quantum feedback in measurements using a parametrically
    coupled microcavity. <i>PRX Quantum</i>. American Physical Society. <a href="https://doi.org/10.1103/PRXQuantum.3.020309">https://doi.org/10.1103/PRXQuantum.3.020309</a>
  chicago: Qiu, Liu, Guanhao Huang, Itay Shomroni, Jiahe Pan, Paul Seidler, and Tobias
    J. Kippenberg. “Dissipative Quantum Feedback in Measurements Using a Parametrically
    Coupled Microcavity.” <i>PRX Quantum</i>. American Physical Society, 2022. <a
    href="https://doi.org/10.1103/PRXQuantum.3.020309">https://doi.org/10.1103/PRXQuantum.3.020309</a>.
  ieee: L. Qiu, G. Huang, I. Shomroni, J. Pan, P. Seidler, and T. J. Kippenberg, “Dissipative
    quantum feedback in measurements using a parametrically coupled microcavity,”
    <i>PRX Quantum</i>, vol. 3, no. 2. American Physical Society, 2022.
  ista: Qiu L, Huang G, Shomroni I, Pan J, Seidler P, Kippenberg TJ. 2022. Dissipative
    quantum feedback in measurements using a parametrically coupled microcavity. PRX
    Quantum. 3(2), 020309.
  mla: Qiu, Liu, et al. “Dissipative Quantum Feedback in Measurements Using a Parametrically
    Coupled Microcavity.” <i>PRX Quantum</i>, vol. 3, no. 2, 020309, American Physical
    Society, 2022, doi:<a href="https://doi.org/10.1103/PRXQuantum.3.020309">10.1103/PRXQuantum.3.020309</a>.
  short: L. Qiu, G. Huang, I. Shomroni, J. Pan, P. Seidler, T.J. Kippenberg, PRX Quantum
    3 (2022).
date_created: 2022-05-08T22:01:43Z
date_published: 2022-04-13T00:00:00Z
date_updated: 2026-04-02T12:30:47Z
day: '13'
ddc:
- '530'
department:
- _id: JoFi
doi: 10.1103/PRXQuantum.3.020309
ec_funded: 1
external_id:
  isi:
  - '000789316700001'
file:
- access_level: open_access
  checksum: 35ff9ddf1d54f64432e435b660edaeb6
  content_type: application/pdf
  creator: dernst
  date_created: 2022-05-09T07:10:51Z
  date_updated: 2022-05-09T07:10:51Z
  file_id: '11358'
  file_name: 2022_PRXQuantum_Qiu.pdf
  file_size: 1657177
  relation: main_file
  success: 1
file_date_updated: 2022-05-09T07:10:51Z
fulldoi: https://doi.org/10.1103/PRXQuantum.3.020309
has_accepted_license: '1'
intvolume: '         3'
isi: 1
issue: '2'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
project:
- _id: 257EB838-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '732894'
  name: Hybrid Optomechanical Technologies
publication: PRX Quantum
publication_identifier:
  eissn:
  - 2691-3399
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Dissipative quantum feedback in measurements using a parametrically coupled
  microcavity
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: 3
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. <i>Applied Physics Letters</i>. 2022;120(19). doi:<a href="https://doi.org/10.1063/5.0097339">10.1063/5.0097339</a>'
  apa: 'Sigillito, A. J., Covey, J. P., Fink, J. M., Petersson, K., &#38; Preble,
    S. (2022). Emerging qubit systems: Guest editorial. <i>Applied Physics Letters</i>.
    American Institute of Physics. <a href="https://doi.org/10.1063/5.0097339">https://doi.org/10.1063/5.0097339</a>'
  chicago: 'Sigillito, Anthony J., Jacob P. Covey, Johannes M Fink, Karl Petersson,
    and Stefan Preble. “Emerging Qubit Systems: Guest Editorial.” <i>Applied Physics
    Letters</i>. American Institute of Physics, 2022. <a href="https://doi.org/10.1063/5.0097339">https://doi.org/10.1063/5.0097339</a>.'
  ieee: 'A. J. Sigillito, J. P. Covey, J. M. Fink, K. Petersson, and S. Preble, “Emerging
    qubit systems: Guest editorial,” <i>Applied Physics Letters</i>, 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.” <i>Applied
    Physics Letters</i>, vol. 120, no. 19, 190401, American Institute of Physics,
    2022, doi:<a href="https://doi.org/10.1063/5.0097339">10.1063/5.0097339</a>.'
  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'
fulldoi: https://doi.org/10.1063/5.0097339
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. <i>Physical Review A</i>.
    2022;105(6). doi:<a href="https://doi.org/10.1103/PhysRevA.105.062454">10.1103/PhysRevA.105.062454</a>
  apa: Agustí, J., Minoguchi, Y., Fink, J. M., &#38; Rabl, P. (2022). Long-distance
    distribution of qubit-qubit entanglement using Gaussian-correlated photonic beams.
    <i>Physical Review A</i>. American Physical Society. <a href="https://doi.org/10.1103/PhysRevA.105.062454">https://doi.org/10.1103/PhysRevA.105.062454</a>
  chicago: Agustí, J., Y. Minoguchi, Johannes M Fink, and P. Rabl. “Long-Distance
    Distribution of Qubit-Qubit Entanglement Using Gaussian-Correlated Photonic Beams.”
    <i>Physical Review A</i>. American Physical Society, 2022. <a href="https://doi.org/10.1103/PhysRevA.105.062454">https://doi.org/10.1103/PhysRevA.105.062454</a>.
  ieee: J. Agustí, Y. Minoguchi, J. M. Fink, and P. Rabl, “Long-distance distribution
    of qubit-qubit entanglement using Gaussian-correlated photonic beams,” <i>Physical
    Review A</i>, 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.” <i>Physical Review A</i>, vol. 105,
    no. 6, 062454, American Physical Society, 2022, doi:<a href="https://doi.org/10.1103/PhysRevA.105.062454">10.1103/PhysRevA.105.062454</a>.
  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'
fulldoi: https://doi.org/10.1103/PhysRevA.105.062454
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: <i>Conference
    on Lasers and Electro-Optics</i>. Optica Publishing Group; 2022. doi:<a href="https://doi.org/10.1364/CLEO_QELS.2022.FW4D.4">10.1364/CLEO_QELS.2022.FW4D.4</a>'
  apa: 'Sahu, R., Hease, W. J., Rueda Sanchez, A. R., Arnold, G. M., Qiu, L., &#38;
    Fink, J. M. (2022). Realizing a quantum-enabled interconnect between microwave
    and telecom light. In <i>Conference on Lasers and Electro-Optics</i>. San Jose,
    CA, United States: Optica Publishing Group. <a href="https://doi.org/10.1364/CLEO_QELS.2022.FW4D.4">https://doi.org/10.1364/CLEO_QELS.2022.FW4D.4</a>'
  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 <i>Conference on Lasers and Electro-Optics</i>.
    Optica Publishing Group, 2022. <a href="https://doi.org/10.1364/CLEO_QELS.2022.FW4D.4">https://doi.org/10.1364/CLEO_QELS.2022.FW4D.4</a>.
  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 <i>Conference on Lasers and Electro-Optics</i>, 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.” <i>Conference on Lasers and Electro-Optics</i>, FW4D.4, Optica
    Publishing Group, 2022, doi:<a href="https://doi.org/10.1364/CLEO_QELS.2022.FW4D.4">10.1364/CLEO_QELS.2022.FW4D.4</a>.
  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
fulldoi: https://doi.org/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:<a
    href="https://doi.org/10.5281/ZENODO.8408897">10.5281/ZENODO.8408897</a>'
  apa: 'Zemlicka, M., Redchenko, E., Peruzzo, M., Hassani, F., Trioni, A., Barzanjeh,
    S., &#38; Fink, J. M. (2022). Compact vacuum gap transmon qubits: Selective and
    sensitive probes for superconductor surface losses. Zenodo. <a href="https://doi.org/10.5281/ZENODO.8408897">https://doi.org/10.5281/ZENODO.8408897</a>'
  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.
    <a href="https://doi.org/10.5281/ZENODO.8408897">https://doi.org/10.5281/ZENODO.8408897</a>.'
  ieee: 'M. Zemlicka <i>et al.</i>, “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, <a href="https://doi.org/10.5281/ZENODO.8408897">10.5281/ZENODO.8408897</a>.'
  mla: 'Zemlicka, Martin, et al. <i>Compact Vacuum Gap Transmon Qubits: Selective
    and Sensitive Probes for Superconductor Surface Losses</i>. Zenodo, 2022, doi:<a
    href="https://doi.org/10.5281/ZENODO.8408897">10.5281/ZENODO.8408897</a>.'
  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
fulldoi: https://doi.org/10.5281/ZENODO.8408897
has_accepted_license: '1'
license: https://creativecommons.org/publicdomain/zero/1.0/
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'
...
---
OA_place: publisher
_id: '12366'
abstract:
- lang: eng
  text: "Recent substantial advances in the feld of superconducting circuits have
    shown its\r\npotential as a leading platform for future quantum computing. In
    contrast to classical\r\ncomputers based on bits that are represented by a single
    binary value, 0 or 1, quantum\r\nbits (or qubits) can be in a superposition of
    both. Thus, quantum computers can store\r\nand handle more information at the
    same time and a quantum advantage has already\r\nbeen demonstrated for two types
    of computational tasks. Rapid progress in academic\r\nand industry labs accelerates
    the development of superconducting processors which may\r\nsoon fnd applications
    in complex computations, chemical simulations, cryptography, and\r\noptimization.
    Now that these machines are scaled up to tackle such problems the questions\r\nof
    qubit interconnects and networks becomes very relevant. How to route signals on-chip\r\nbetween
    diferent processor components? What is the most efcient way to entangle\r\nqubits?
    And how to then send and process entangled signals between distant cryostats\r\nhosting
    superconducting processors?\r\nIn this thesis, we are looking for solutions to
    these problems by studying the collective\r\nbehavior of superconducting qubit
    ensembles. We frst demonstrate on-demand tunable\r\ndirectional scattering of
    microwave photons from a pair of qubits in a waveguide. Such a\r\ndevice can route
    microwave photons on-chip with a high diode efciency. Then we focus\r\non studying
    ultra-strong coupling regimes between light (microwave photons) and matter\r\n(superconducting
    qubits), a regime that could be promising for extremely fast multi-qubit\r\nentanglement
    generation. Finally, we show coherent pulse storage and periodic revivals\r\nin
    a fve qubit ensemble strongly coupled to a resonator. Such a reconfgurable storage\r\ndevice
    could be used as part of a quantum repeater that is needed for longer-distance\r\nquantum
    communication.\r\nThe achieved high degree of control over multi-qubit ensembles
    highlights not only the\r\nbeautiful physics of circuit quantum electrodynamics,
    it also represents the frst step\r\ntoward new quantum simulation and communication
    methods, and certain techniques\r\nmay also fnd applications in future superconducting
    quantum computing hardware.\r\n"
acknowledged_ssus:
- _id: NanoFab
- _id: M-Shop
- _id: EM-Fac
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Elena
  full_name: Redchenko, Elena
  id: 2C21D6E8-F248-11E8-B48F-1D18A9856A87
  last_name: Redchenko
citation:
  ama: Redchenko E. Controllable states of superconducting Qubit ensembles. 2022.
    doi:<a href="https://doi.org/10.15479/at:ista:12132">10.15479/at:ista:12132</a>
  apa: Redchenko, E. (2022). <i>Controllable states of superconducting Qubit ensembles</i>.
    Institute of Science and Technology Austria. <a href="https://doi.org/10.15479/at:ista:12132">https://doi.org/10.15479/at:ista:12132</a>
  chicago: Redchenko, Elena. “Controllable States of Superconducting Qubit Ensembles.”
    Institute of Science and Technology Austria, 2022. <a href="https://doi.org/10.15479/at:ista:12132">https://doi.org/10.15479/at:ista:12132</a>.
  ieee: E. Redchenko, “Controllable states of superconducting Qubit ensembles,” Institute
    of Science and Technology Austria, 2022.
  ista: Redchenko E. 2022. Controllable states of superconducting Qubit ensembles.
    Institute of Science and Technology Austria.
  mla: Redchenko, Elena. <i>Controllable States of Superconducting Qubit Ensembles</i>.
    Institute of Science and Technology Austria, 2022, doi:<a href="https://doi.org/10.15479/at:ista:12132">10.15479/at:ista:12132</a>.
  short: E. Redchenko, Controllable States of Superconducting Qubit Ensembles, Institute
    of Science and Technology Austria, 2022.
corr_author: '1'
date_created: 2023-01-25T09:17:02Z
date_published: 2022-09-26T00:00:00Z
date_updated: 2026-04-07T14:22:39Z
day: '26'
ddc:
- '530'
degree_awarded: PhD
department:
- _id: GradSch
- _id: JoFi
doi: 10.15479/at:ista:12132
ec_funded: 1
file:
- access_level: open_access
  checksum: 39eabb1e006b41335f17f3b29af09648
  content_type: application/pdf
  creator: cchlebak
  date_created: 2023-01-25T09:41:49Z
  date_updated: 2023-01-26T23:30:44Z
  embargo: 2022-12-28
  file_id: '12367'
  file_name: Final_Thesis_ES_Redchenko.pdf
  file_size: 56076868
  relation: main_file
file_date_updated: 2023-01-26T23:30:44Z
fulldoi: https://doi.org/10.15479/at:ista:12132
has_accepted_license: '1'
language:
- iso: eng
month: '09'
oa: 1
oa_version: Published Version
page: '168'
project:
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '665385'
  name: International IST Doctoral Program
- _id: 26336814-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '758053'
  name: A Fiber Optic Transceiver for Superconducting Qubits
- _id: 237CBA6C-32DE-11EA-91FC-C7463DDC885E
  call_identifier: H2020
  grant_number: '862644'
  name: Quantum readout techniques and technologies
publication_identifier:
  isbn:
  - 978-3-99078-024-4
  issn:
  - 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
status: public
supervisor:
- first_name: Johannes M
  full_name: Fink, Johannes M
  id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
  last_name: Fink
  orcid: 0000-0001-8112-028X
title: Controllable states of superconducting Qubit ensembles
type: dissertation
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
year: '2022'
...
---
_id: '10924'
abstract:
- lang: eng
  text: Solid-state microwave systems offer strong interactions for fast quantum logic
    and sensing but photons at telecom wavelength are the ideal choice for high-density
    low-loss quantum interconnects. A general-purpose interface that can make use
    of single photon effects requires < 1 input noise quanta, which has remained elusive
    due to either low efficiency or pump induced heating. Here we demonstrate coherent
    electro-optic modulation on nanosecond-timescales with only 0.16+0.02−0.01 microwave
    input noise photons with a total bidirectional transduction efficiency of 8.7%
    (or up to 15% with 0.41+0.02−0.02), as required for near-term heralded quantum
    network protocols. The use of short and high-power optical pump pulses also enables
    near-unity cooperativity of the electro-optic interaction leading to an internal
    pure conversion efficiency of up to 99.5%. Together with the low mode occupancy
    this provides evidence for electro-optic laser cooling and vacuum amplification
    as predicted a decade ago.
acknowledged_ssus:
- _id: M-Shop
acknowledgement: "The authors thank S. Wald and F. Diorico for their help with optical
  filtering, O. Hosten\r\nand M. Aspelmeyer for equipment, H.G.L. Schwefel for materials
  and discussions, L.\r\nDrmic and P. Zielinski for software support, and the MIBA
  workshop at IST Austria for\r\nmachining the microwave cavity. This work was supported
  by the European Research\r\nCouncil under grant agreement no. 758053 (ERC StG QUNNECT)
  and the European\r\nUnion’s Horizon 2020 research and innovation program under grant
  agreement no.\r\n899354 (FETopen SuperQuLAN). W.H. is the recipient of an ISTplus
  postdoctoral fellowship\r\nwith funding from the European Union’s Horizon 2020 research
  and innovation\r\nprogram under the Marie Skłodowska-Curie grant agreement no. 754411.
  G.A. is the\r\nrecipient of a DOC fellowship of the Austrian Academy of Sciences
  at IST Austria. J.M.F.\r\nacknowledges support from the Austrian Science Fund (FWF)
  through BeyondC (F7105)\r\nand the European Union’s Horizon 2020 research and innovation
  programs under grant\r\nagreement no. 862644 (FETopen QUARTET)."
article_number: '1276'
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: 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. Quantum-enabled
    operation of a microwave-optical interface. <i>Nature Communications</i>. 2022;13.
    doi:<a href="https://doi.org/10.1038/s41467-022-28924-2">10.1038/s41467-022-28924-2</a>
  apa: Sahu, R., Hease, W. J., Rueda Sanchez, A. R., Arnold, G. M., Qiu, L., &#38;
    Fink, J. M. (2022). Quantum-enabled operation of a microwave-optical interface.
    <i>Nature Communications</i>. Springer Nature. <a href="https://doi.org/10.1038/s41467-022-28924-2">https://doi.org/10.1038/s41467-022-28924-2</a>
  chicago: Sahu, Rishabh, William J Hease, Alfredo R Rueda Sanchez, Georg M Arnold,
    Liu Qiu, and Johannes M Fink. “Quantum-Enabled Operation of a Microwave-Optical
    Interface.” <i>Nature Communications</i>. Springer Nature, 2022. <a href="https://doi.org/10.1038/s41467-022-28924-2">https://doi.org/10.1038/s41467-022-28924-2</a>.
  ieee: R. Sahu, W. J. Hease, A. R. Rueda Sanchez, G. M. Arnold, L. Qiu, and J. M.
    Fink, “Quantum-enabled operation of a microwave-optical interface,” <i>Nature
    Communications</i>, vol. 13. Springer Nature, 2022.
  ista: Sahu R, Hease WJ, Rueda Sanchez AR, Arnold GM, Qiu L, Fink JM. 2022. Quantum-enabled
    operation of a microwave-optical interface. Nature Communications. 13, 1276.
  mla: Sahu, Rishabh, et al. “Quantum-Enabled Operation of a Microwave-Optical Interface.”
    <i>Nature Communications</i>, vol. 13, 1276, Springer Nature, 2022, doi:<a href="https://doi.org/10.1038/s41467-022-28924-2">10.1038/s41467-022-28924-2</a>.
  short: R. Sahu, W.J. Hease, A.R. Rueda Sanchez, G.M. Arnold, L. Qiu, J.M. Fink,
    Nature Communications 13 (2022).
corr_author: '1'
date_created: 2022-03-27T22:01:45Z
date_published: 2022-03-11T00:00:00Z
date_updated: 2026-11-09T23:30:28Z
day: '11'
ddc:
- '530'
department:
- _id: JoFi
doi: 10.1038/s41467-022-28924-2
ec_funded: 1
external_id:
  arxiv:
  - '2107.08303'
  isi:
  - '000767892300013'
  pmid:
  - '35277488'
file:
- access_level: open_access
  checksum: 7c5176db7b8e2ed18a4e0c5aca70a72c
  content_type: application/pdf
  creator: dernst
  date_created: 2022-03-28T08:02:12Z
  date_updated: 2022-03-28T08:02:12Z
  file_id: '10929'
  file_name: 2022_NatureCommunications_Sahu.pdf
  file_size: 1167492
  relation: main_file
  success: 1
file_date_updated: 2022-03-28T08:02:12Z
fulldoi: https://doi.org/10.1038/s41467-022-28924-2
has_accepted_license: '1'
intvolume: '        13'
isi: 1
language:
- iso: eng
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: 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: 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: '13175'
    relation: dissertation_contains
    status: public
  - id: '12900'
    relation: dissertation_contains
    status: public
  - id: '18871'
    relation: dissertation_contains
    status: public
scopus_import: '1'
status: public
title: Quantum-enabled operation of a microwave-optical interface
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: 13
year: '2022'
...
---
_id: '13057'
abstract:
- lang: eng
  text: 'This dataset comprises all data shown in the figures of the submitted article
    "Geometric superinductance qubits: Controlling phase delocalization across a single
    Josephson junction". Additional raw data are available from the corresponding
    author on reasonable request.'
article_processing_charge: No
author:
- 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: Grisha
  full_name: Szep, Grisha
  last_name: Szep
- first_name: Andrea
  full_name: Trioni, Andrea
  id: 42F71B44-F248-11E8-B48F-1D18A9856A87
  last_name: Trioni
- first_name: Elena
  full_name: Redchenko, Elena
  id: 2C21D6E8-F248-11E8-B48F-1D18A9856A87
  last_name: Redchenko
- 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: 'Peruzzo M, Hassani F, Szep G, et al. Geometric superinductance qubits: Controlling
    phase delocalization across a single Josephson junction. 2021. doi:<a href="https://doi.org/10.5281/ZENODO.5592103">10.5281/ZENODO.5592103</a>'
  apa: 'Peruzzo, M., Hassani, F., Szep, G., Trioni, A., Redchenko, E., Zemlicka, M.,
    &#38; Fink, J. M. (2021). Geometric superinductance qubits: Controlling phase
    delocalization across a single Josephson junction. Zenodo. <a href="https://doi.org/10.5281/ZENODO.5592103">https://doi.org/10.5281/ZENODO.5592103</a>'
  chicago: 'Peruzzo, Matilda, Farid Hassani, Grisha Szep, Andrea Trioni, Elena Redchenko,
    Martin Zemlicka, and Johannes M Fink. “Geometric Superinductance Qubits: Controlling
    Phase Delocalization across a Single Josephson Junction.” Zenodo, 2021. <a href="https://doi.org/10.5281/ZENODO.5592103">https://doi.org/10.5281/ZENODO.5592103</a>.'
  ieee: 'M. Peruzzo <i>et al.</i>, “Geometric superinductance qubits: Controlling
    phase delocalization across a single Josephson junction.” Zenodo, 2021.'
  ista: 'Peruzzo M, Hassani F, Szep G, Trioni A, Redchenko E, Zemlicka M, Fink JM.
    2021. Geometric superinductance qubits: Controlling phase delocalization across
    a single Josephson junction, Zenodo, <a href="https://doi.org/10.5281/ZENODO.5592103">10.5281/ZENODO.5592103</a>.'
  mla: 'Peruzzo, Matilda, et al. <i>Geometric Superinductance Qubits: Controlling
    Phase Delocalization across a Single Josephson Junction</i>. Zenodo, 2021, doi:<a
    href="https://doi.org/10.5281/ZENODO.5592103">10.5281/ZENODO.5592103</a>.'
  short: M. Peruzzo, F. Hassani, G. Szep, A. Trioni, E. Redchenko, M. Zemlicka, J.M.
    Fink, (2021).
corr_author: '1'
date_created: 2023-05-23T13:42:27Z
date_published: 2021-10-22T00:00:00Z
date_updated: 2026-04-15T06:41:45Z
day: '22'
ddc:
- '530'
department:
- _id: JoFi
doi: 10.5281/ZENODO.5592103
fulldoi: https://doi.org/10.5281/ZENODO.5592103
main_file_link:
- open_access: '1'
  url: https://doi.org/10.5281/zenodo.5592104
month: '10'
oa: 1
oa_version: Published Version
publisher: Zenodo
related_material:
  record:
  - id: '9928'
    relation: used_in_publication
    status: public
status: public
title: 'Geometric superinductance qubits: Controlling phase delocalization across
  a single Josephson junction'
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: '2021'
...
---
_id: '10644'
abstract:
- lang: eng
  text: The purpose of this application note is to demonstrate a working example of
    a superconducting qubit measurement in a Bluefors cryostat using the Keysight
    quantum control hardware. Our motivation is twofold. First, we provide pre-qualification
    data that the Bluefors cryostat, including filtering and wiring, can support long-lived
    qubits. Second, we demonstrate that the Keysight system (controlled using Labber)
    provides a straightforward solution to perform these characterization measurements.
    This document is intended as a brief guide for starting an experimental platform
    for testing superconducting qubits. The setup described here is an immediate jumping
    off point for a suite of applications including testing quantum logical gates,
    quantum optics with microwaves, or even using the qubit itself as a sensitive
    probe of local electromagnetic fields. Qubit measurements rely on high performance
    of both the physical sample environment and the measurement electronics. An overview
    of the cryogenic system is shown in Figure 1, and an overview of the integration
    between the electronics and cryostat (including wiring details) is shown in Figure
    2.
alternative_title:
- Bluefors Blog
article_processing_charge: No
author:
- first_name: Russell
  full_name: Lake, Russell
  last_name: Lake
- first_name: Slawomir
  full_name: Simbierowicz, Slawomir
  last_name: Simbierowicz
- first_name: Philip
  full_name: Krantz, Philip
  last_name: Krantz
- 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
citation:
  ama: 'Lake R, Simbierowicz S, Krantz P, Hassani F, Fink JM. <i>The Bluefors Dilution
    Refrigerator as an Integrated Quantum Measurement System</i>. Helsinki, Finland:
    Bluefors Oy; 2021.'
  apa: 'Lake, R., Simbierowicz, S., Krantz, P., Hassani, F., &#38; Fink, J. M. (2021).
    <i>The Bluefors dilution refrigerator as an integrated quantum measurement system</i>.
    Helsinki, Finland: Bluefors Oy.'
  chicago: 'Lake, Russell, Slawomir Simbierowicz, Philip Krantz, Farid Hassani, and
    Johannes M Fink. <i>The Bluefors Dilution Refrigerator as an Integrated Quantum
    Measurement System</i>. Helsinki, Finland: Bluefors Oy, 2021.'
  ieee: 'R. Lake, S. Simbierowicz, P. Krantz, F. Hassani, and J. M. Fink, <i>The Bluefors
    dilution refrigerator as an integrated quantum measurement system</i>. Helsinki,
    Finland: Bluefors Oy, 2021.'
  ista: 'Lake R, Simbierowicz S, Krantz P, Hassani F, Fink JM. 2021. The Bluefors
    dilution refrigerator as an integrated quantum measurement system, Helsinki, Finland:
    Bluefors Oy, 9p.'
  mla: Lake, Russell, et al. <i>The Bluefors Dilution Refrigerator as an Integrated
    Quantum Measurement System</i>. Bluefors Oy, 2021.
  short: R. Lake, S. Simbierowicz, P. Krantz, F. Hassani, J.M. Fink, The Bluefors
    Dilution Refrigerator as an Integrated Quantum Measurement System, Bluefors Oy,
    Helsinki, Finland, 2021.
date_created: 2022-01-19T08:29:57Z
date_published: 2021-04-20T00:00:00Z
date_updated: 2026-06-18T08:45:11Z
day: '20'
ddc:
- '530'
department:
- _id: JoFi
keyword:
- Application note
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://bluefors.com/blog/integrated-quantum-measurement-system/
month: '04'
oa: 1
oa_version: Published Version
page: '9'
place: Helsinki, Finland
publication_status: published
publisher: Bluefors Oy
quality_controlled: '1'
status: public
title: The Bluefors dilution refrigerator as an integrated quantum measurement system
type: other_academic_publication
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2021'
...
---
_id: '10645'
abstract:
- lang: eng
  text: "Superconducting qubits have emerged as a highly versatile and useful platform
    for quantum technological applications [1]. Bluefors and Zurich Instruments have
    supported the growth of this field from the 2010s onwards by providing well-engineered
    and reliable measurement infrastructure [2]– [6]. Having a long and stable qubit
    lifetime is a critical system property. Therefore, considerable effort has already
    gone into measuring qubit energy-relaxation timescales and their fluctuations,
    see Refs. [7]–[10] among others. Accurately extracting the statistics of a quantum
    device requires users to perform time consuming measurements. One measurement
    challenge is that the detection of the state-dependent\r\nresponse of a superconducting
    resonator due to a dispersively-coupled qubit requires an inherently low signal
    level. Consequently, measurements must be performed using a microwave probe that
    contains only a few microwave photons. Improving the signal-to-noise ratio (SNR)
    by using near-quantum limited parametric amplifiers as well as the use of optimized
    signal processing enabled by efficient room temperature instrumentation help to
    reduce measurement time. An empirical observation for fixed frequency transmons
    from recent literature is that as the energy-relaxation time \U0001D447\U0001D4471
    increases, so do its natural temporal fluctuations [7], [10]. This necessitates
    many repeated measurements to understand the statistics (see for example, Ref.
    [10]). In addition, as state-of-the-art qubits increase in lifetime, longer\r\nmeasurement
    times are expected to obtain accurate statistics. As described below, the scaling
    of the widths of the qubit energy-relaxation distributions also reveal clues about
    the origin of the energy-relaxation."
alternative_title:
- Bluefors Blog
article_processing_charge: No
author:
- first_name: Slawomir
  full_name: Simbierowicz, Slawomir
  last_name: Simbierowicz
- first_name: Chunyan
  full_name: Shi, Chunyan
  last_name: Shi
- first_name: Michele
  full_name: Collodo, Michele
  last_name: Collodo
- first_name: Moritz
  full_name: Kirste, Moritz
  last_name: Kirste
- 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: Jonas
  full_name: Bylander, Jonas
  last_name: Bylander
- first_name: Daniel
  full_name: Perez Lozano, Daniel
  last_name: Perez Lozano
- first_name: Russell
  full_name: Lake, Russell
  last_name: Lake
citation:
  ama: 'Simbierowicz S, Shi C, Collodo M, et al. <i>Qubit Energy-Relaxation Statistics
    in the Bluefors Quantum Measurement System</i>. Helsinki, Finland: Bluefors Oy;
    2021.'
  apa: 'Simbierowicz, S., Shi, C., Collodo, M., Kirste, M., Hassani, F., Fink, J.
    M., … Lake, R. (2021). <i>Qubit energy-relaxation statistics in the Bluefors quantum
    measurement system</i>. Helsinki, Finland: Bluefors Oy.'
  chicago: 'Simbierowicz, Slawomir, Chunyan Shi, Michele Collodo, Moritz Kirste, Farid
    Hassani, Johannes M Fink, Jonas Bylander, Daniel Perez Lozano, and Russell Lake.
    <i>Qubit Energy-Relaxation Statistics in the Bluefors Quantum Measurement System</i>.
    Helsinki, Finland: Bluefors Oy, 2021.'
  ieee: 'S. Simbierowicz <i>et al.</i>, <i>Qubit energy-relaxation statistics in the
    Bluefors quantum measurement system</i>. Helsinki, Finland: Bluefors Oy, 2021.'
  ista: 'Simbierowicz S, Shi C, Collodo M, Kirste M, Hassani F, Fink JM, Bylander
    J, Perez Lozano D, Lake R. 2021. Qubit energy-relaxation statistics in the Bluefors
    quantum measurement system, Helsinki, Finland: Bluefors Oy, 8p.'
  mla: Simbierowicz, Slawomir, et al. <i>Qubit Energy-Relaxation Statistics in the
    Bluefors Quantum Measurement System</i>. Bluefors Oy, 2021.
  short: S. Simbierowicz, C. Shi, M. Collodo, M. Kirste, F. Hassani, J.M. Fink, J.
    Bylander, D. Perez Lozano, R. Lake, Qubit Energy-Relaxation Statistics in the
    Bluefors Quantum Measurement System, Bluefors Oy, Helsinki, Finland, 2021.
date_created: 2022-01-19T08:41:14Z
date_published: 2021-06-03T00:00:00Z
date_updated: 2026-06-18T08:46:15Z
day: '03'
ddc:
- '530'
department:
- _id: JoFi
keyword:
- Application note
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://bluefors.com/blog/application-note-qubit-energy-relaxation-statistics-bluefors-quantum-measurement-system/
month: '06'
oa: 1
oa_version: Published Version
page: '8'
place: Helsinki, Finland
publication_status: published
publisher: Bluefors Oy
quality_controlled: '1'
status: public
title: Qubit energy-relaxation statistics in the Bluefors quantum measurement system
type: other_academic_publication
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2021'
...
---
_id: '9242'
abstract:
- lang: eng
  text: In the recent years important experimental advances in resonant electro-optic
    modulators as high-efficiency sources for coherent frequency combs and as devices
    for quantum information transfer have been realized, where strong optical and
    microwave mode coupling were achieved. These features suggest electro-optic-based
    devices as candidates for entangled optical frequency comb sources. In the present
    work, I study the generation of entangled optical frequency combs in millimeter-sized
    resonant electro-optic modulators. These devices profit from the experimentally
    proven advantages such as nearly constant optical free spectral ranges over several
    gigahertz, and high optical and microwave quality factors. The generation of frequency
    multiplexed quantum channels with spectral bandwidth in the MHz range for conservative
    parameter values paves the way towards novel uses in long-distance hybrid quantum
    networks, quantum key distribution, enhanced optical metrology, and quantum computing.
acknowledgement: "I thank Prof. Shabir Barzanjeh and Dr. Ulrich Vogl for the fruitful
  discussions.\r\n"
article_number: '023708'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- 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
citation:
  ama: Rueda Sanchez AR. Frequency-multiplexed hybrid optical entangled source based
    on the Pockels effect. <i>Physical Review A</i>. 2021;103(2). doi:<a href="https://doi.org/10.1103/PhysRevA.103.023708">10.1103/PhysRevA.103.023708</a>
  apa: Rueda Sanchez, A. R. (2021). Frequency-multiplexed hybrid optical entangled
    source based on the Pockels effect. <i>Physical Review A</i>. American Physical
    Society. <a href="https://doi.org/10.1103/PhysRevA.103.023708">https://doi.org/10.1103/PhysRevA.103.023708</a>
  chicago: Rueda Sanchez, Alfredo R. “Frequency-Multiplexed Hybrid Optical Entangled
    Source Based on the Pockels Effect.” <i>Physical Review A</i>. American Physical
    Society, 2021. <a href="https://doi.org/10.1103/PhysRevA.103.023708">https://doi.org/10.1103/PhysRevA.103.023708</a>.
  ieee: A. R. Rueda Sanchez, “Frequency-multiplexed hybrid optical entangled source
    based on the Pockels effect,” <i>Physical Review A</i>, vol. 103, no. 2. American
    Physical Society, 2021.
  ista: Rueda Sanchez AR. 2021. Frequency-multiplexed hybrid optical entangled source
    based on the Pockels effect. Physical Review A. 103(2), 023708.
  mla: Rueda Sanchez, Alfredo R. “Frequency-Multiplexed Hybrid Optical Entangled Source
    Based on the Pockels Effect.” <i>Physical Review A</i>, vol. 103, no. 2, 023708,
    American Physical Society, 2021, doi:<a href="https://doi.org/10.1103/PhysRevA.103.023708">10.1103/PhysRevA.103.023708</a>.
  short: A.R. Rueda Sanchez, Physical Review A 103 (2021).
date_created: 2021-03-14T23:01:33Z
date_published: 2021-02-11T00:00:00Z
date_updated: 2023-08-07T14:11:18Z
day: '11'
department:
- _id: JoFi
doi: 10.1103/PhysRevA.103.023708
external_id:
  arxiv:
  - '2010.05356'
  isi:
  - '000617037900013'
fulldoi: https://doi.org/10.1103/PhysRevA.103.023708
intvolume: '       103'
isi: 1
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/2010.05356
month: '02'
oa: 1
oa_version: Preprint
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: Frequency-multiplexed hybrid optical entangled source based on the Pockels
  effect
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 103
year: '2021'
...
---
_id: '9815'
abstract:
- lang: eng
  text: The quantum bits (qubits) on which superconducting quantum computers are based
    have energy scales corresponding to photons with GHz frequencies. The energy of
    photons in the gigahertz domain is too low to allow transmission through the noisy
    room-temperature environment, where the signal would be lost in thermal noise.
    Optical photons, on the other hand, have much higher energies, and signals can
    be detected using highly efficient single-photon detectors. Transduction from
    microwave to optical frequencies is therefore a potential enabling technology
    for quantum devices. However, in such a device the optical pump can be a source
    of thermal noise and thus degrade the fidelity; the similarity of input microwave
    state to the output optical state. In order to investigate the magnitude of this
    effect we model the sub-Kelvin thermal behavior of an electro-optic transducer
    based on a lithium niobate whispering gallery mode resonator. We find that there
    is an optimum power level for a continuous pump, whilst pulsed operation of the
    pump increases the fidelity of the conversion.
acknowledgement: NJL is supported by the MBIE Endeavour Fund (UOOX1805) and GL is
  by the Julius von Haast Fellowship of New Zealand. SM acknowledges stimulating discussions
  with T M Jensen.
article_number: '045005'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Sonia
  full_name: Mobassem, Sonia
  last_name: Mobassem
- first_name: Nicholas J.
  full_name: Lambert, Nicholas J.
  last_name: Lambert
- 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: Johannes M
  full_name: Fink, Johannes M
  id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
  last_name: Fink
  orcid: 0000-0001-8112-028X
- first_name: Gerd
  full_name: Leuchs, Gerd
  last_name: Leuchs
- first_name: Harald G.L.
  full_name: Schwefel, Harald G.L.
  last_name: Schwefel
citation:
  ama: Mobassem S, Lambert NJ, Rueda Sanchez AR, Fink JM, Leuchs G, Schwefel HGL.
    Thermal noise in electro-optic devices at cryogenic temperatures. <i>Quantum Science
    and Technology</i>. 2021;6(4). doi:<a href="https://doi.org/10.1088/2058-9565/ac0f36">10.1088/2058-9565/ac0f36</a>
  apa: Mobassem, S., Lambert, N. J., Rueda Sanchez, A. R., Fink, J. M., Leuchs, G.,
    &#38; Schwefel, H. G. L. (2021). Thermal noise in electro-optic devices at cryogenic
    temperatures. <i>Quantum Science and Technology</i>. IOP Publishing. <a href="https://doi.org/10.1088/2058-9565/ac0f36">https://doi.org/10.1088/2058-9565/ac0f36</a>
  chicago: Mobassem, Sonia, Nicholas J. Lambert, Alfredo R Rueda Sanchez, Johannes
    M Fink, Gerd Leuchs, and Harald G.L. Schwefel. “Thermal Noise in Electro-Optic
    Devices at Cryogenic Temperatures.” <i>Quantum Science and Technology</i>. IOP
    Publishing, 2021. <a href="https://doi.org/10.1088/2058-9565/ac0f36">https://doi.org/10.1088/2058-9565/ac0f36</a>.
  ieee: S. Mobassem, N. J. Lambert, A. R. Rueda Sanchez, J. M. Fink, G. Leuchs, and
    H. G. L. Schwefel, “Thermal noise in electro-optic devices at cryogenic temperatures,”
    <i>Quantum Science and Technology</i>, vol. 6, no. 4. IOP Publishing, 2021.
  ista: Mobassem S, Lambert NJ, Rueda Sanchez AR, Fink JM, Leuchs G, Schwefel HGL.
    2021. Thermal noise in electro-optic devices at cryogenic temperatures. Quantum
    Science and Technology. 6(4), 045005.
  mla: Mobassem, Sonia, et al. “Thermal Noise in Electro-Optic Devices at Cryogenic
    Temperatures.” <i>Quantum Science and Technology</i>, vol. 6, no. 4, 045005, IOP
    Publishing, 2021, doi:<a href="https://doi.org/10.1088/2058-9565/ac0f36">10.1088/2058-9565/ac0f36</a>.
  short: S. Mobassem, N.J. Lambert, A.R. Rueda Sanchez, J.M. Fink, G. Leuchs, H.G.L.
    Schwefel, Quantum Science and Technology 6 (2021).
date_created: 2021-08-08T22:01:25Z
date_published: 2021-07-15T00:00:00Z
date_updated: 2023-10-17T12:54:54Z
day: '15'
ddc:
- '530'
department:
- _id: JoFi
doi: 10.1088/2058-9565/ac0f36
external_id:
  arxiv:
  - '2008.08764'
  isi:
  - '000673081500001'
file:
- access_level: open_access
  checksum: b15c2c228487a75002c3b52d56f23d5c
  content_type: application/pdf
  creator: cchlebak
  date_created: 2021-08-09T12:23:13Z
  date_updated: 2021-08-09T12:23:13Z
  file_id: '9836'
  file_name: 2021_QuantumScienceTechnology_Mobassem.pdf
  file_size: 2366118
  relation: main_file
file_date_updated: 2021-08-09T12:23:13Z
fulldoi: https://doi.org/10.1088/2058-9565/ac0f36
has_accepted_license: '1'
intvolume: '         6'
isi: 1
issue: '4'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
publication: Quantum Science and Technology
publication_identifier:
  eissn:
  - 2058-9565
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: Thermal noise in electro-optic devices at cryogenic temperatures
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 6
year: '2021'
...
---
OA_place: publisher
_id: '9920'
abstract:
- lang: eng
  text: 'This work is concerned with two fascinating circuit quantum electrodynamics
    components, the Josephson junction and the geometric superinductor, and the interesting
    experiments that can be done by combining the two. The Josephson junction has
    revolutionized the field of superconducting circuits as a non-linear dissipation-less
    circuit element and is used in almost all superconducting qubit implementations
    since the 90s. On the other hand, the superinductor is a relatively new circuit
    element introduced as a key component of the fluxonium qubit in 2009. This is
    an inductor with characteristic impedance larger than the resistance quantum and
    self-resonance frequency in the GHz regime. The combination of these two elements
    can occur in two fundamental ways: in parallel and in series. When connected in
    parallel the two create the fluxonium qubit, a loop with large inductance and
    a rich energy spectrum reliant on quantum tunneling. On the other hand placing
    the two elements in series aids with the measurement of the IV curve of a single
    Josephson junction in a high impedance environment. In this limit theory predicts
    that the junction will behave as its dual element: the phase-slip junction. While
    the Josephson junction acts as a non-linear inductor the phase-slip junction has
    the behavior of a non-linear capacitance and can be used to measure new Josephson
    junction phenomena, namely Coulomb blockade of Cooper pairs and phase-locked Bloch
    oscillations. The latter experiment allows for a direct link between frequency
    and current which is an elusive connection in quantum metrology. This work introduces
    the geometric superinductor, a superconducting circuit element where the high
    inductance is due to the geometry rather than the material properties of the superconductor,
    realized from a highly miniaturized superconducting planar coil. These structures
    will be described and characterized as resonators and qubit inductors and progress
    towards the measurement of phase-locked Bloch oscillations will be presented.'
acknowledged_ssus:
- _id: NanoFab
- _id: M-Shop
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Matilda
  full_name: Peruzzo, Matilda
  id: 3F920B30-F248-11E8-B48F-1D18A9856A87
  last_name: Peruzzo
  orcid: 0000-0002-3415-4628
citation:
  ama: Peruzzo M. Geometric superinductors and their applications in circuit quantum
    electrodynamics. 2021. doi:<a href="https://doi.org/10.15479/at:ista:9920">10.15479/at:ista:9920</a>
  apa: Peruzzo, M. (2021). <i>Geometric superinductors and their applications in circuit
    quantum electrodynamics</i>. Institute of Science and Technology Austria. <a href="https://doi.org/10.15479/at:ista:9920">https://doi.org/10.15479/at:ista:9920</a>
  chicago: Peruzzo, Matilda. “Geometric Superinductors and Their Applications in Circuit
    Quantum Electrodynamics.” Institute of Science and Technology Austria, 2021. <a
    href="https://doi.org/10.15479/at:ista:9920">https://doi.org/10.15479/at:ista:9920</a>.
  ieee: M. Peruzzo, “Geometric superinductors and their applications in circuit quantum
    electrodynamics,” Institute of Science and Technology Austria, 2021.
  ista: Peruzzo M. 2021. Geometric superinductors and their applications in circuit
    quantum electrodynamics. Institute of Science and Technology Austria.
  mla: Peruzzo, Matilda. <i>Geometric Superinductors and Their Applications in Circuit
    Quantum Electrodynamics</i>. Institute of Science and Technology Austria, 2021,
    doi:<a href="https://doi.org/10.15479/at:ista:9920">10.15479/at:ista:9920</a>.
  short: M. Peruzzo, Geometric Superinductors and Their Applications in Circuit Quantum
    Electrodynamics, Institute of Science and Technology Austria, 2021.
corr_author: '1'
date_created: 2021-08-16T09:44:09Z
date_published: 2021-08-19T00:00:00Z
date_updated: 2026-04-15T06:43:02Z
day: '19'
ddc:
- '539'
degree_awarded: PhD
department:
- _id: GradSch
- _id: JoFi
doi: 10.15479/at:ista:9920
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file_date_updated: 2021-09-06T08:39:47Z
fulldoi: https://doi.org/10.15479/at:ista:9920
has_accepted_license: '1'
keyword:
- quantum computing
- superinductor
- quantum metrology
language:
- iso: eng
month: '08'
oa: 1
oa_version: Published Version
page: '149'
publication_identifier:
  isbn:
  - 978-3-99078-013-8
  issn:
  - 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
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    status: public
  - id: '8755'
    relation: part_of_dissertation
    status: public
status: public
supervisor:
- first_name: Johannes M
  full_name: Fink, Johannes M
  id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
  last_name: Fink
  orcid: 0000-0001-8112-028X
title: Geometric superinductors and their applications in circuit quantum electrodynamics
type: dissertation
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
year: '2021'
...
---
_id: '9928'
abstract:
- lang: eng
  text: There are two elementary superconducting qubit types that derive directly
    from the quantum harmonic oscillator. In one, the inductor is replaced by a nonlinear
    Josephson junction to realize the widely used charge qubits with a compact phase
    variable and a discrete charge wave function. In the other, the junction is added
    in parallel, which gives rise to an extended phase variable, continuous wave functions,
    and a rich energy-level structure due to the loop topology. While the corresponding
    rf superconducting quantum interference device Hamiltonian was introduced as a
    quadratic quasi-one-dimensional potential approximation to describe the fluxonium
    qubit implemented with long Josephson-junction arrays, in this work we implement
    it directly using a linear superinductor formed by a single uninterrupted aluminum
    wire. We present a large variety of qubits, all stemming from the same circuit
    but with drastically different characteristic energy scales. This includes flux
    and fluxonium qubits but also the recently introduced quasicharge qubit with strongly
    enhanced zero-point phase fluctuations and a heavily suppressed flux dispersion.
    The use of a geometric inductor results in high reproducibility of the inductive
    energy as guaranteed by top-down lithography—a key ingredient for intrinsically
    protected superconducting qubits.
acknowledged_ssus:
- _id: NanoFab
- _id: M-Shop
acknowledgement: We thank W. Hughes for analytic and numerical modeling during the
  early stages of this work, J. Koch for discussions and support with the scqubits
  package, R. Sett, P. Zielinski, and L. Drmic for software development, and G. Katsaros
  for equipment support, as well as the MIBA workshop and the Institute of Science
  and Technology Austria nanofabrication facility. We thank I. Pop, S. Deleglise,
  and E. Flurin for discussions. This work was supported by a NOMIS Foundation research
  grant, the Austrian Science Fund (FWF) through BeyondC (F7105), and IST Austria.
  M.P. is the recipient of a Pöttinger scholarship at IST Austria. E.R. is the recipient
  of a DOC fellowship of the Austrian Academy of Sciences at IST Austria.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- 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: Gregory
  full_name: Szep, Gregory
  last_name: Szep
- first_name: Andrea
  full_name: Trioni, Andrea
  id: 42F71B44-F248-11E8-B48F-1D18A9856A87
  last_name: Trioni
- first_name: Elena
  full_name: Redchenko, Elena
  id: 2C21D6E8-F248-11E8-B48F-1D18A9856A87
  last_name: Redchenko
- 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: 'Peruzzo M, Hassani F, Szep G, et al. Geometric superinductance qubits: Controlling
    phase delocalization across a single Josephson junction. <i>PRX Quantum</i>. 2021;2(4):040341.
    doi:<a href="https://doi.org/10.1103/PRXQuantum.2.040341">10.1103/PRXQuantum.2.040341</a>'
  apa: 'Peruzzo, M., Hassani, F., Szep, G., Trioni, A., Redchenko, E., Zemlicka, M.,
    &#38; Fink, J. M. (2021). Geometric superinductance qubits: Controlling phase
    delocalization across a single Josephson junction. <i>PRX Quantum</i>. American
    Physical Society. <a href="https://doi.org/10.1103/PRXQuantum.2.040341">https://doi.org/10.1103/PRXQuantum.2.040341</a>'
  chicago: 'Peruzzo, Matilda, Farid Hassani, Gregory Szep, Andrea Trioni, Elena Redchenko,
    Martin Zemlicka, and Johannes M Fink. “Geometric Superinductance Qubits: Controlling
    Phase Delocalization across a Single Josephson Junction.” <i>PRX Quantum</i>.
    American Physical Society, 2021. <a href="https://doi.org/10.1103/PRXQuantum.2.040341">https://doi.org/10.1103/PRXQuantum.2.040341</a>.'
  ieee: 'M. Peruzzo <i>et al.</i>, “Geometric superinductance qubits: Controlling
    phase delocalization across a single Josephson junction,” <i>PRX Quantum</i>,
    vol. 2, no. 4. American Physical Society, p. 040341, 2021.'
  ista: 'Peruzzo M, Hassani F, Szep G, Trioni A, Redchenko E, Zemlicka M, Fink JM.
    2021. Geometric superinductance qubits: Controlling phase delocalization across
    a single Josephson junction. PRX Quantum. 2(4), 040341.'
  mla: 'Peruzzo, Matilda, et al. “Geometric Superinductance Qubits: Controlling Phase
    Delocalization across a Single Josephson Junction.” <i>PRX Quantum</i>, vol. 2,
    no. 4, American Physical Society, 2021, p. 040341, doi:<a href="https://doi.org/10.1103/PRXQuantum.2.040341">10.1103/PRXQuantum.2.040341</a>.'
  short: M. Peruzzo, F. Hassani, G. Szep, A. Trioni, E. Redchenko, M. Zemlicka, J.M.
    Fink, PRX Quantum 2 (2021) 040341.
corr_author: '1'
date_created: 2021-08-17T08:14:18Z
date_published: 2021-11-24T00:00:00Z
date_updated: 2026-10-02T11:28:16Z
day: '24'
ddc:
- '530'
department:
- _id: JoFi
- _id: NanoFab
- _id: M-Shop
doi: 10.1103/PRXQuantum.2.040341
ec_funded: 1
external_id:
  arxiv:
  - '2106.05882'
  isi:
  - '000723015100001'
file:
- access_level: open_access
  checksum: 36eb41ea43d8ca22b0efab12419e4eb2
  content_type: application/pdf
  creator: cchlebak
  date_created: 2022-01-18T11:29:33Z
  date_updated: 2022-01-18T11:29:33Z
  file_id: '10641'
  file_name: 2021_PRXQuantum_Peruzzo.pdf
  file_size: 4247422
  relation: main_file
  success: 1
file_date_updated: 2022-01-18T11:29:33Z
fulldoi: https://doi.org/10.1103/PRXQuantum.2.040341
has_accepted_license: '1'
intvolume: '         2'
isi: 1
issue: '4'
keyword:
- quantum physics
- mesoscale and nanoscale physics
language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
page: '040341'
project:
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '665385'
  name: International IST Doctoral Program
- _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: PRX Quantum
publication_identifier:
  eissn:
  - 2691-3399
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
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title: 'Geometric superinductance qubits: Controlling phase delocalization across
  a single Josephson junction'
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volume: 2
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...
---
_id: '13056'
abstract:
- lang: eng
  text: This datasets comprises all data shown in plots of the submitted article "Converting
    microwave and telecom photons with a silicon photonic nanomechanical interface".
    Additional raw data are available from the corresponding author on reasonable
    request.
article_processing_charge: No
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: Matthias
  full_name: Wulf, Matthias
  id: 45598606-F248-11E8-B48F-1D18A9856A87
  last_name: Wulf
  orcid: 0000-0001-6613-1378
- first_name: Shabir
  full_name: Barzanjeh, Shabir
  id: 2D25E1F6-F248-11E8-B48F-1D18A9856A87
  last_name: Barzanjeh
  orcid: 0000-0003-0415-1423
- first_name: Elena
  full_name: Redchenko, Elena
  id: 2C21D6E8-F248-11E8-B48F-1D18A9856A87
  last_name: Redchenko
- 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: William J
  full_name: Hease, William J
  id: 29705398-F248-11E8-B48F-1D18A9856A87
  last_name: Hease
  orcid: 0000-0001-9868-2166
- 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
citation:
  ama: Arnold GM, Wulf M, Barzanjeh S, et al. Converting microwave and telecom photons
    with a silicon photonic nanomechanical interface. 2020. doi:<a href="https://doi.org/10.5281/ZENODO.3961561">10.5281/ZENODO.3961561</a>
  apa: Arnold, G. M., Wulf, M., Barzanjeh, S., Redchenko, E., Rueda Sanchez, A. R.,
    Hease, W. J., … Fink, J. M. (2020). Converting microwave and telecom photons with
    a silicon photonic nanomechanical interface. Zenodo. <a href="https://doi.org/10.5281/ZENODO.3961561">https://doi.org/10.5281/ZENODO.3961561</a>
  chicago: Arnold, Georg M, Matthias Wulf, Shabir Barzanjeh, Elena Redchenko, Alfredo
    R Rueda Sanchez, William J Hease, Farid Hassani, and Johannes M Fink. “Converting
    Microwave and Telecom Photons with a Silicon Photonic Nanomechanical Interface.”
    Zenodo, 2020. <a href="https://doi.org/10.5281/ZENODO.3961561">https://doi.org/10.5281/ZENODO.3961561</a>.
  ieee: G. M. Arnold <i>et al.</i>, “Converting microwave and telecom photons with
    a silicon photonic nanomechanical interface.” Zenodo, 2020.
  ista: Arnold GM, Wulf M, Barzanjeh S, Redchenko E, Rueda Sanchez AR, Hease WJ, Hassani
    F, Fink JM. 2020. Converting microwave and telecom photons with a silicon photonic
    nanomechanical interface, Zenodo, <a href="https://doi.org/10.5281/ZENODO.3961561">10.5281/ZENODO.3961561</a>.
  mla: Arnold, Georg M., et al. <i>Converting Microwave and Telecom Photons with a
    Silicon Photonic Nanomechanical Interface</i>. Zenodo, 2020, doi:<a href="https://doi.org/10.5281/ZENODO.3961561">10.5281/ZENODO.3961561</a>.
  short: G.M. Arnold, M. Wulf, S. Barzanjeh, E. Redchenko, A.R. Rueda Sanchez, W.J.
    Hease, F. Hassani, J.M. Fink, (2020).
corr_author: '1'
date_created: 2023-05-23T13:37:41Z
date_published: 2020-07-27T00:00:00Z
date_updated: 2025-06-12T07:03:01Z
day: '27'
ddc:
- '530'
department:
- _id: JoFi
doi: 10.5281/ZENODO.3961561
fulldoi: https://doi.org/10.5281/ZENODO.3961561
main_file_link:
- open_access: '1'
  url: https://doi.org/10.5281/zenodo.3961562
month: '07'
oa: 1
oa_version: Published Version
publisher: Zenodo
related_material:
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status: public
title: Converting microwave and telecom photons with a silicon photonic nanomechanical
  interface
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
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type: research_data_reference
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...
---
_id: '13070'
abstract:
- lang: eng
  text: This dataset comprises all data shown in the figures of the submitted article
    "Surpassing the resistance quantum with a geometric superinductor". Additional
    raw data are available from the corresponding author on reasonable request.
article_processing_charge: No
author:
- first_name: Matilda
  full_name: Peruzzo, Matilda
  id: 3F920B30-F248-11E8-B48F-1D18A9856A87
  last_name: Peruzzo
  orcid: 0000-0002-3415-4628
- first_name: Andrea
  full_name: Trioni, Andrea
  id: 42F71B44-F248-11E8-B48F-1D18A9856A87
  last_name: Trioni
- first_name: Farid
  full_name: Hassani, Farid
  id: 2AED110C-F248-11E8-B48F-1D18A9856A87
  last_name: Hassani
  orcid: 0000-0001-6937-5773
- 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: Peruzzo M, Trioni A, Hassani F, Zemlicka M, Fink JM. Surpassing the resistance
    quantum with a geometric superinductor. 2020. doi:<a href="https://doi.org/10.5281/ZENODO.4052882">10.5281/ZENODO.4052882</a>
  apa: Peruzzo, M., Trioni, A., Hassani, F., Zemlicka, M., &#38; Fink, J. M. (2020).
    Surpassing the resistance quantum with a geometric superinductor. Zenodo. <a href="https://doi.org/10.5281/ZENODO.4052882">https://doi.org/10.5281/ZENODO.4052882</a>
  chicago: Peruzzo, Matilda, Andrea Trioni, Farid Hassani, Martin Zemlicka, and Johannes
    M Fink. “Surpassing the Resistance Quantum with a Geometric Superinductor.” Zenodo,
    2020. <a href="https://doi.org/10.5281/ZENODO.4052882">https://doi.org/10.5281/ZENODO.4052882</a>.
  ieee: M. Peruzzo, A. Trioni, F. Hassani, M. Zemlicka, and J. M. Fink, “Surpassing
    the resistance quantum with a geometric superinductor.” Zenodo, 2020.
  ista: Peruzzo M, Trioni A, Hassani F, Zemlicka M, Fink JM. 2020. Surpassing the
    resistance quantum with a geometric superinductor, Zenodo, <a href="https://doi.org/10.5281/ZENODO.4052882">10.5281/ZENODO.4052882</a>.
  mla: Peruzzo, Matilda, et al. <i>Surpassing the Resistance Quantum with a Geometric
    Superinductor</i>. Zenodo, 2020, doi:<a href="https://doi.org/10.5281/ZENODO.4052882">10.5281/ZENODO.4052882</a>.
  short: M. Peruzzo, A. Trioni, F. Hassani, M. Zemlicka, J.M. Fink, (2020).
corr_author: '1'
date_created: 2023-05-23T16:42:30Z
date_published: 2020-09-27T00:00:00Z
date_updated: 2026-04-15T06:43:02Z
day: '27'
ddc:
- '530'
department:
- _id: JoFi
doi: 10.5281/ZENODO.4052882
fulldoi: https://doi.org/10.5281/ZENODO.4052882
main_file_link:
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month: '09'
oa: 1
oa_version: Published Version
publisher: Zenodo
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status: public
title: Surpassing the resistance quantum with a geometric superinductor
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type: research_data_reference
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...
