Optimal cooling of a driven artificial atom in dissipative environment
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Optimal cooling of a driven artificial atom in dissipative environment
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| Creator |
Du, Lingjie
Yu, Yang Lan, D. |
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| Subject |
Свеpхпpоводимость, в том числе высокотемпеpатуpная
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| 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. |
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| Date |
2017-05-29T14:16:39Z
2017-05-29T14:16:39Z 2013 |
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| Type |
Article
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| Identifier |
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 http://dspace.nbuv.gov.ua/handle/123456789/118259 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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