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arXiv 2012.10149cond-mat.mes-hallquant-ph
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约瑟夫森结-腔电路中的多光子共振

Multi-Photon Resonances in Josephson Junction-Cavity Circuits

Ben Lang, Andrew D. Armour

摘要:

我们探讨的耗散动力学的非线性驱动的振荡器系统调谐到多个激发产生的共振。这样的系统很容易在电路QED系统中实现,该系统将约瑟夫森结与微波腔相结合,并且通过通量或电压偏置实现驱动。对于涉及3个或更多个光子的共振,随着驱动的增加,系统经历了一系列两个紧密间隔的动力学跃迁(第一个是不连续的,第二个是连续的),从而导致在相空间中形成复杂的周期性结构的稳定状态。在附近的过渡的系统显示有趣的非线性行为:我们发现,相干效应可以导致令人惊讶的振荡的重量不同的动态状态的稳定状态的系统,随着驱动器的增加。我们表明,动力学是很好地描述了一个简单的有效速率模型与本地化在相空间晶体中的不同点的状态之间的转换。动态状态的权重的振荡反映在描述状态之间的转换的时间尺度中的对应振荡中。

英文摘要:

We explore the dissipative dynamics of nonlinearly driven oscillator systems tuned to resonances where multiple excitations are generated. Such systems are readily realised in circuit QED systems combining Josephson junctions with a microwave cavity and a drive achieved either through flux or voltage bias. For resonances involving 3 or more photons the system undergoes a sequence of two closely spaced dynamical transitions (the first one discontinuous and the second continuous) as the driving is increased leading to steady states that form complex periodic structures in phase space. In the vicinity of the transitions the system displays interesting bistable behaviour: we find that coherent effects can lead to surprising oscillations in the weight of the different dynamical states in the steady state of the system with increasing drive. We show that the dynamics is well-described by a simple effective rate model with transitions between states localised at different points in the phase space crystal. The oscillations in the weights of the dynamical states is reflected in corresponding oscillations in a time-scale that describes transitions between the states.

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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