Measurement and dephasing of a flux qubit due to heat currents
We study a flux qubit made of a superconducting loop interrupted by three Josephson junctions, which is subject to a temperature gradient. We show that the heat current induced by the temperature gradient, being sensitive to the superconducting phase differences at the junctions, depends significant...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2014-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/16/4/045020 |
| _version_ | 1797751456294502400 |
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| author | Samuele Spilla Fabian Hassler Janine Splettstoesser |
| author_facet | Samuele Spilla Fabian Hassler Janine Splettstoesser |
| author_sort | Samuele Spilla |
| collection | DOAJ |
| description | We study a flux qubit made of a superconducting loop interrupted by three Josephson junctions, which is subject to a temperature gradient. We show that the heat current induced by the temperature gradient, being sensitive to the superconducting phase differences at the junctions, depends significantly on the state of the qubit. We furthermore investigate the impact of the heat current on the coherence properties of the qubit state. We have found that even small temperature gradients can lead to dephasing times of the order of microseconds for the Delft-qubit design. |
| first_indexed | 2024-03-12T16:49:49Z |
| format | Article |
| id | doaj.art-9ec63b6220014a32994971f6ab76572c |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:49:49Z |
| publishDate | 2014-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-9ec63b6220014a32994971f6ab76572c2023-08-08T11:25:01ZengIOP PublishingNew Journal of Physics1367-26302014-01-0116404502010.1088/1367-2630/16/4/045020Measurement and dephasing of a flux qubit due to heat currentsSamuele Spilla0Fabian Hassler1Janine Splettstoesser2Institut für Theorie der Statistischen Physik, RWTH Aachen University , D-52056 Aachen, Germany; JARA-Fundamentals of Future Information Technology; Dipartimento di Fisica e Chimica, Università di Palermo , I-90123 Palermo, ItalyJARA-Fundamentals of Future Information Technology; Institute for Quantum Information, RWTH Aachen University , D-52056 Aachen, GermanyInstitut für Theorie der Statistischen Physik, RWTH Aachen University , D-52056 Aachen, Germany; JARA-Fundamentals of Future Information TechnologyWe study a flux qubit made of a superconducting loop interrupted by three Josephson junctions, which is subject to a temperature gradient. We show that the heat current induced by the temperature gradient, being sensitive to the superconducting phase differences at the junctions, depends significantly on the state of the qubit. We furthermore investigate the impact of the heat current on the coherence properties of the qubit state. We have found that even small temperature gradients can lead to dephasing times of the order of microseconds for the Delft-qubit design.https://doi.org/10.1088/1367-2630/16/4/045020thermoelectricsJosephson devicesquantum information74.50.+r85.25.Cp74.25.fg |
| spellingShingle | Samuele Spilla Fabian Hassler Janine Splettstoesser Measurement and dephasing of a flux qubit due to heat currents New Journal of Physics thermoelectrics Josephson devices quantum information 74.50.+r 85.25.Cp 74.25.fg |
| title | Measurement and dephasing of a flux qubit due to heat currents |
| title_full | Measurement and dephasing of a flux qubit due to heat currents |
| title_fullStr | Measurement and dephasing of a flux qubit due to heat currents |
| title_full_unstemmed | Measurement and dephasing of a flux qubit due to heat currents |
| title_short | Measurement and dephasing of a flux qubit due to heat currents |
| title_sort | measurement and dephasing of a flux qubit due to heat currents |
| topic | thermoelectrics Josephson devices quantum information 74.50.+r 85.25.Cp 74.25.fg |
| url | https://doi.org/10.1088/1367-2630/16/4/045020 |
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