Signal amplification in a qubit-resonator system

Signal amplification in a qubit-resonator system

Karpov, D.S. ; Oelsner, G. ; Shevchenko, S.N. ; Greenberg, Ya.S. ; Il’ichev, E.

Тема: Свеpхпpоводимость, в том числе высокотемпеpатуpная

Інший ID: PACS: 42.50.Hz, 85.25.Am, 85.25.Cp, 85.25.Hv

URI: http://dspace.nbuv.gov.ua/handle/123456789/128489

Посилання: Signal amplification in a qubit-resonator system / D.S. Karpov, G. Oelsner, S.N. Shevchenko, Ya.S. Greenberg, E. Il’ichev // Физика низких температур. — 2016. — Т. 42, № 3. — С. 246–253. — Бібліогр.: 41 назв. — англ.

Підтримка: This work was partly supported by DKNII (Project No. M/231-2013), BMBF (UKR-2012-028), RFFR (No. 15-32- 50195/15), MES (8.337.2014/K). D.S.K. acknowledges the hospitality of IPHT (Jena, Germany) and NSTU (Novosibirsk, Russia), where part of this work was done. The authors are grateful to A.N. Omelyanchouk for useful discussions and comments.

Дата: 2016

Завантажень: 441

Signal amplification in a qubit-resonator system

Анотація:

We study the dynamics of a qubit-resonator system, when the resonator is driven by two signals. The interaction of the qubit with the high-amplitude driving we consider in terms of the qubit dressed states. Interaction of the dressed qubit with the second probing signal can essentially change the amplitude of this signal. We calculate the transmission amplitude of the probe signal through the resonator as a function of the qubit’s energy and the driving frequency detuning. The regions of increase and attenuation of the transmitted signal are calculated and demonstrated graphically. We present the influence of the signal parameters on the value of the amplification, and discuss the values of the qubit-resonator system parameters for an optimal amplification and attenuation of the weak probe signal.

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