Optimal cooling of a driven artificial atom in dissipative environment
We study microwave-driven cooling in a superconducting flux qubit subjected to environment noises. For the weak decoherence, our analytical results agree well with the experimental observations and show that the microwave amplitude for optimal cooling should depend linearly on the dc flux detuning...
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| Veröffentlicht in: | Физика низких температур |
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| Datum: | 2013 |
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| Sprache: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2013
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Optimal cooling of a driven artificial atom in dissipative environment / Lingjie Du, Yang Yu, D. Lan // Физика низких температур. — 2013. — Т. 39, № 2. — С. 150–161. — Бібліогр.: 62 назв. — англ. |
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Du, Lingjie Yu, Yang Lan, D. 2017-05-29T14:16:39Z 2017-05-29T14:16:39Z 2013 Optimal cooling of a driven artificial atom in dissipative environment / Lingjie Du, Yang Yu, D. Lan // Физика низких температур. — 2013. — Т. 39, № 2. — С. 150–161. — Бібліогр.: 62 назв. — англ. 0132-6414 PACS: 37.10.De, 03.65.Yz, 85.25.–j, 03.67.Lx https://nasplib.isofts.kiev.ua/handle/123456789/118259 We study microwave-driven cooling in a superconducting flux qubit subjected to environment noises. For the weak decoherence, our analytical results agree well with the experimental observations and show that the microwave amplitude for optimal cooling should depend linearly on the dc flux detuning. With the decoherence stronger, more vibrational degrees of freedom (analogous with atomic physics) couple in, making the ordinary cooling method less effective or even fail. We propose an improved cooling method, which can eliminate the perturbation of additional vibrational degrees of freedom hence keep high efficiency, even under the strong decoherence. Furthermore, we point out that the decoherence can tune the frequency where microwave-driven Landau–Zener transition reaches maximum, displaying the feature of incoherent dynamics which is important for the optimal cooling of qubits and other quantum systems. We thank S.O. Valenzuela for useful discussions. This work was partly supported by the State Key Program for Basic Researches of China (2011CB922104, 2011CBA00205), the NSFC (91021003), the Natural Science Foundation of Jiangsu Province (BK2010012), and PAPD. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Свеpхпpоводимость, в том числе высокотемпеpатуpная Optimal cooling of a driven artificial atom in dissipative environment Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Optimal cooling of a driven artificial atom in dissipative environment |
| spellingShingle |
Optimal cooling of a driven artificial atom in dissipative environment Du, Lingjie Yu, Yang Lan, D. Свеpхпpоводимость, в том числе высокотемпеpатуpная |
| title_short |
Optimal cooling of a driven artificial atom in dissipative environment |
| title_full |
Optimal cooling of a driven artificial atom in dissipative environment |
| title_fullStr |
Optimal cooling of a driven artificial atom in dissipative environment |
| title_full_unstemmed |
Optimal cooling of a driven artificial atom in dissipative environment |
| title_sort |
optimal cooling of a driven artificial atom in dissipative environment |
| author |
Du, Lingjie Yu, Yang Lan, D. |
| author_facet |
Du, Lingjie Yu, Yang Lan, D. |
| topic |
Свеpхпpоводимость, в том числе высокотемпеpатуpная |
| topic_facet |
Свеpхпpоводимость, в том числе высокотемпеpатуpная |
| publishDate |
2013 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| description |
We study microwave-driven cooling in a superconducting flux qubit subjected to environment noises. For the
weak decoherence, our analytical results agree well with the experimental observations and show that the microwave
amplitude for optimal cooling should depend linearly on the dc flux detuning. With the decoherence
stronger, more vibrational degrees of freedom (analogous with atomic physics) couple in, making the ordinary
cooling method less effective or even fail. We propose an improved cooling method, which can eliminate the
perturbation of additional vibrational degrees of freedom hence keep high efficiency, even under the strong decoherence.
Furthermore, we point out that the decoherence can tune the frequency where microwave-driven
Landau–Zener transition reaches maximum, displaying the feature of incoherent dynamics which is important
for the optimal cooling of qubits and other quantum systems.
|
| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/118259 |
| citation_txt |
Optimal cooling of a driven artificial atom in dissipative environment / Lingjie Du, Yang Yu, D. Lan // Физика низких температур. — 2013. — Т. 39, № 2. — С. 150–161. — Бібліогр.: 62 назв. — англ. |
| work_keys_str_mv |
AT dulingjie optimalcoolingofadrivenartificialatomindissipativeenvironment AT yuyang optimalcoolingofadrivenartificialatomindissipativeenvironment AT land optimalcoolingofadrivenartificialatomindissipativeenvironment |
| first_indexed |
2025-11-27T22:35:22Z |
| last_indexed |
2025-11-27T22:35:22Z |
| _version_ |
1850852923342323712 |