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Quantum bath suppression in a superconducting circuit by immersion cooling
Quantum circuits interact with the environment via several temperature-dependent degrees of freedom. Multiple experiments to-date have shown that most properties of superconducting devices appear to plateau out at T ≈ 50 mK – far above the refrigerator base temperature. This is for example reflected...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10267208/ https://www.ncbi.nlm.nih.gov/pubmed/37316500 http://dx.doi.org/10.1038/s41467-023-39249-z |
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author | Lucas, M. Danilov, A. V. Levitin, L. V. Jayaraman, A. Casey, A. J. Faoro, L. Tzalenchuk, A. Ya. Kubatkin, S. E. Saunders, J. de Graaf, S. E. |
author_facet | Lucas, M. Danilov, A. V. Levitin, L. V. Jayaraman, A. Casey, A. J. Faoro, L. Tzalenchuk, A. Ya. Kubatkin, S. E. Saunders, J. de Graaf, S. E. |
author_sort | Lucas, M. |
collection | PubMed |
description | Quantum circuits interact with the environment via several temperature-dependent degrees of freedom. Multiple experiments to-date have shown that most properties of superconducting devices appear to plateau out at T ≈ 50 mK – far above the refrigerator base temperature. This is for example reflected in the thermal state population of qubits, in excess numbers of quasiparticles, and polarisation of surface spins – factors contributing to reduced coherence. We demonstrate how to remove this thermal constraint by operating a circuit immersed in liquid (3)He. This allows to efficiently cool the decohering environment of a superconducting resonator, and we see a continuous change in measured physical quantities down to previously unexplored sub-mK temperatures. The (3)He acts as a heat sink which increases the energy relaxation rate of the quantum bath coupled to the circuit a thousand times, yet the suppressed bath does not introduce additional circuit losses or noise. Such quantum bath suppression can reduce decoherence in quantum circuits and opens a route for both thermal and coherence management in quantum processors. |
format | Online Article Text |
id | pubmed-10267208 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-102672082023-06-15 Quantum bath suppression in a superconducting circuit by immersion cooling Lucas, M. Danilov, A. V. Levitin, L. V. Jayaraman, A. Casey, A. J. Faoro, L. Tzalenchuk, A. Ya. Kubatkin, S. E. Saunders, J. de Graaf, S. E. Nat Commun Article Quantum circuits interact with the environment via several temperature-dependent degrees of freedom. Multiple experiments to-date have shown that most properties of superconducting devices appear to plateau out at T ≈ 50 mK – far above the refrigerator base temperature. This is for example reflected in the thermal state population of qubits, in excess numbers of quasiparticles, and polarisation of surface spins – factors contributing to reduced coherence. We demonstrate how to remove this thermal constraint by operating a circuit immersed in liquid (3)He. This allows to efficiently cool the decohering environment of a superconducting resonator, and we see a continuous change in measured physical quantities down to previously unexplored sub-mK temperatures. The (3)He acts as a heat sink which increases the energy relaxation rate of the quantum bath coupled to the circuit a thousand times, yet the suppressed bath does not introduce additional circuit losses or noise. Such quantum bath suppression can reduce decoherence in quantum circuits and opens a route for both thermal and coherence management in quantum processors. Nature Publishing Group UK 2023-06-14 /pmc/articles/PMC10267208/ /pubmed/37316500 http://dx.doi.org/10.1038/s41467-023-39249-z Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Lucas, M. Danilov, A. V. Levitin, L. V. Jayaraman, A. Casey, A. J. Faoro, L. Tzalenchuk, A. Ya. Kubatkin, S. E. Saunders, J. de Graaf, S. E. Quantum bath suppression in a superconducting circuit by immersion cooling |
title | Quantum bath suppression in a superconducting circuit by immersion cooling |
title_full | Quantum bath suppression in a superconducting circuit by immersion cooling |
title_fullStr | Quantum bath suppression in a superconducting circuit by immersion cooling |
title_full_unstemmed | Quantum bath suppression in a superconducting circuit by immersion cooling |
title_short | Quantum bath suppression in a superconducting circuit by immersion cooling |
title_sort | quantum bath suppression in a superconducting circuit by immersion cooling |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10267208/ https://www.ncbi.nlm.nih.gov/pubmed/37316500 http://dx.doi.org/10.1038/s41467-023-39249-z |
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