Dynamic behavior of Josephson-junction qubits: crossover between Rabi oscillations and Landau–Zener transitions

Dynamic behavior of Josephson-junction qubits: crossover between Rabi oscillations and Landau–Zener transitions

Shevchenko, S.N. ; Kiyko, A.S. ; Omelyanchouk, A.N. ; Krech, W.

Тема: Свеpхпpоводимость, в том числе высокотемпеpатуpная

Інший ID: PACS: 03.67.Lx, 03.75.Lm, 74.50.+r, 85.25.Am

URI: http://dspace.nbuv.gov.ua/handle/123456789/121668

Посилання: Dynamic behavior of Josephson-junction qubits: crossover between Rabi oscillations and Landau–Zener transitions / S.N. Shevchenko, A.S. Kiyko, A.N. Omelyanchouk, W. Krech // Физика низких температур. — 2005. — Т. 31, № 7. — С. 752-760. — Бібліогр.: 28 назв. — англ.

Підтримка: This work was supported in part by the program «Nanosystems, nanomaterials, and nanotechnology» of the National Academy of Sciences of Ukraine. S.N. Sh. acknowledges the support of the German Academic Exchange Service (DAAD). The authors thank V.I. Shnyrkov for fruitful discussions.

Дата: 2005

Завантажень: 455

Dynamic behavior of Josephson-junction qubits: crossover between Rabi oscillations and Landau–Zener transitions

Анотація:

We study the dynamic behavior of a quantum two-level system with periodically varying parameters by solving numerically the master equation for the density matrix. Two limiting cases are considered: multiphoton Rabi oscillations and Landau–Zener transitions. The approach is applied to the description of the dynamics of superconducting qubits. In particular, the case of the interferometer- type charge qubit with periodically varying parameters (gate voltage or magnetic flux) is investigated. The time-averaged energy level populations are calculated as functions of the qubit’s control parameters.

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