论文标题
通过在开放量子系统中传播的信息后热度化
Post-thermalization via information spreading in open quantum systems
论文作者
论文摘要
通常，从将系统降低状态放松到平衡状态的角度分析了与宏观环境结合的开放系统中的热化。不太强调浴室状态。但是，如先前所示的某些特定模型所示，在热化过程中，环境可能会经历非平凡的动力学，这是由于其von Neumann熵的变化所表明的，在时间尺度上比系统的松弛时间更长。在这里，这种行为被昵称为热水后化。我们通过模拟各种系统的全部动态以及它们的环境来提供对这种现象的更详细分析。特别是，由于对系统和浴室之间最初构建的相关性的重新扭曲与环境自由度之间的相关性，对热后的化度是定性解释的。我们还提出了模范系统，其中由于非马克维亚动力学或相互作用的存在，这种重新转化被抑制。
Thermalization in open systems coupled to macroscopic environments is usually analyzed from the perspective of relaxation of the reduced state of the system to the equilibrium state. Less emphasis is given to the change of the state of the bath. However, as previously shown for some specific models, during the thermalization the environment may undergo a nontrivial dynamics, indicated by the the change of its von Neumann entropy, at time scales even longer than the relaxation time of the system; here such a behavior is nicknamed as post-thermalization. We provide a more detailed analysis of this phenomenon by simulating the full dynamics of a variety of systems together with their environment. In particular, the post-thermalization is qualitatively explained as a result of reconversion of the initially built up correlation between the system and the bath into the correlation between the degrees of freedom in the environment. We also present exemplary systems in which such a reconversion is suppressed due to non-Markovian dynamics or the presence of interactions.
