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arXiv 1607.03054quant-phcond-mat.mes-hallcond-mat.supr-con
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非稳态传输线腔中的超导量子比特:参量激发、周期泵浦和能量耗散

Superconducting qubit in a nonstationary transmission line cavity: parametric excitation, periodic pumping, and energy dissipation

A. A. Zhukov, D. S. Shapiro, S. V. Remizov, W. V. Pogosov, Yu. E. Lozovik

摘要:

考虑了耦合到非稳态传输线腔中的超导量子比特在考虑能量耗散的情况下的频率调制。以前,它被证明,在一个单一的腔频率的非线性调制的情况下,有两个通道的两个能级系统的激发,这是由于吸收的Casimir光子和由于反向旋转波过程负责的动态兰姆效应。我们发现,谐振器频率的参数周期调制可以显着增加的激发概率。值得注意的是,在这种调制下的反向旋转波过程开始发挥重要作用,即使在共振制度。我们的预测可以用来控制量子比特-谐振腔量子态,以及研究不同通道的参数量子比特激发的实验。

英文摘要:

We consider a superconducting qubit coupled to the nonstationary transmission line cavity with modulated frequency taking into account energy dissipation. Previously, it was demonstrated that in the case of a single nonadiabatical modulation of a cavity frequency there are two channels of a two-level system excitation which are due to the absorption of Casimir photons and due to the counterrotating wave processes responsible for the dynamical Lamb effect. We show that the parametric periodical modulation of the resonator frequency can increase dramatically the excitation probability. Remarkably, counterrotating wave processes under such a modulation start to play an important role even in the resonant regime. Our predictions can be used to control qubit-resonator quantum states as well as to study experimentally different channels of a parametric qubit excitation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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