论文标题
在特殊点上耗散增益系统中的量子相关性
Quantum correlations in dissipative gain-loss systems across exceptional points
论文作者
论文摘要
我们研究了耗散增益系统中相关动力学的行为。首先，我们考虑由两个耦合有损振荡器制成的设置，其中一个设置会受到本地收益的影响。这提供了一个更现实的平台来实现平等时光（PT）对称性，以规避实施纯收益。我们展示了相关性的定性动力学与纯粹的损害设置相似。主要的定量效应是量子相关性降低，而总量子相关性得到了增强。其次，我们研究了参数的PT对称制度之外的特殊点（EP）的这些相关性的行为，从而观察到EP的不同行为仅在瞬态动力学中发生。这显示了PT对称性在很大程度上起着相关的作用。
We investigate the behavior of correlations dynamics in a dissipative gain-loss system. First, we consider a setup made of two coupled lossy oscillators, with one of them subject to a local gain. This provides a more realistic platform to implement parity-time (PT) symmetry circumventing the implementation of a pure gain. We show how the qualitative dynamics of correlations resembles that for a pure-gain-loss setup. The major quantitative effect is that quantum correlations are reduced, while total ones are enhanced. Second, we study the behavior of these correlations across an exceptional point (EP) outside of the PT-symmetric regime of parameters, observing how different behaviors across the EP occur only in the transient dynamics. This shows how PT symmetry plays a relevant role at large times.
