论文标题
约瑟夫森交界处电路中的多光子共振
Multi-Photon Resonances in Josephson Junction-Cavity Circuits
论文作者
论文摘要
我们探讨了未直线驱动的振荡器系统的耗散动力学，并调整了产生多种激发的共振。在将约瑟夫森连接与微波腔和通过通量或电压偏置实现的驱动器相结合的电路QED系统中很容易实现此类系统。对于涉及3个或更多光子的共振，系统会经历两个紧密间隔的动力学转变（第一个不连续的和第二个连续）的序列，因为驱动会增加导致在相位空间中形成复杂周期结构的稳态。在过渡的附近，系统显示出有趣的双重行为：我们发现，连贯的效果会导致在系统稳态下，随着驱动器的增加，不同动态状态的重量令人惊讶。我们表明，动力学是由简单有效速率模型很好地描述的，该模型在相位晶体中不同点的状态之间进行了过渡。动态状态的权重的振荡反映在描述状态之间过渡的时间尺度中相应的振荡中。
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.
