We study the dynamics of correlations in a paradigmatic setup to observe -symmetric physics: a pair of coupled oscillators, one subject to a gain one to a loss. Starting from a coherent state, quantum correlations (QCs) are created, despite the system being driven only incoherently, and can survive indefinitely. Both total and QCs exhibit different scalings of their long-time behavior in the -broken/unbroken phase and at the exceptional point (EP). In particular, symmetry breaking is accompanied by non-zero stationary QCs. This is analytically shown and quantitatively explained in terms of entropy balance. The EP in particular stands out as the most classical configuration, as classical correlations diverge while QCs vanish.

我们研究一个范式设置中的相关动力学，以观察对称物理学：一对耦合的振荡器，一个受增益影响而受损失。尽管系统是非相干驱动的，但从相干状态开始会创建量子相关性（QC），并且可以无限期地生存。总量控制和质量控制在-破碎/未破坏阶段以及异常点（EP）上表现出不同的长期行为标度。特别是，对称破坏伴随着非零的静态QC。通过熵平衡分析地显示和定量地解释了这一点。特别是，EP是最经典的配置，因为当QC消失时，经典的相关性会发散。