论文标题
反馈引起的不稳定性和动态模型
Feedback-induced instabilities and dynamics in the Jaynes-Cummings model
论文作者
论文摘要
我们研究了在多种激发方案中受到时间延迟相干反馈的Jaynes-Cummings模型的相干性和稳态特性。引入的反馈通过执行非马克维亚进化来定性地修改系统的动态响应和稳态量子性能。当两级系统（TLS）直接由激光驱动时，这会导致恢复的崩溃和复兴以及非平衡稳态。后者的特征是光谱线宽狭窄和相关函数，这些函数在时间延迟和反馈阶段选择方面具有鲁棒性。这些效果在实验可访问的数量中也可以证明，例如功率谱和二阶相关函数$ g^{（2）}（τ）$在标准且广泛可用的光子检测设置中。
We investigate the coherence and steady-state properties of the Jaynes-Cummings model subjected to time-delayed coherent feedback in the regime of multiple excitations. The introduced feedback qualitatively modifies the dynamical response and steady-state quantum properties of the system by enforcing a non-Markovian evolution. This leads to recovered collapses and revivals as well as non-equilibrium steady states when the two-level system (TLS) is directly driven by a laser. The latter are characterized by narrowed spectral linewidth and diverging correlation functions that are robust against the time delay and feedback phase choices. These effects are also demonstrated in experimentally accessible quantities such as the power spectrum and the second-order correlation function $g^{(2)}(τ)$ in standard and widely available photon-detection setups.
