论文标题
系统间耦合对微观碰撞模型中热传输的影响
Effect of inter-system coupling on heat transport in a microscopic collision model
论文作者
论文摘要
在本文中，我们考虑了一个由两个子系统组成的二分系统，该系统耦合到其自己的热环境。基于碰撞模型，我们主要研究近似值（即在建模系统环境耦合时忽略系统间相互作用）是否有效。我们还针对传统的传统能源保护系统 - 环境相互作用和非能源保存系统 - 环境相互作用而联合地解决了热传输的问题。对于前者的相互作用，随着系统间的相互作用强度的提高，起初，这种近似值会随着预期的预期而变得越来越差，但是对于更强大的系统间耦合，违反直觉也会变得更好。对于后一种与不对称性的相互作用，这种近似逐渐变得更糟。在这种情况下，我们意识到了完美的热矫正，并且找不到前一种相互作用的明显矫正效果。最后，更重要的是，我们的结果表明，这种近似是否有效与子系统之间的量子相关性密切相关，即量子相关性越弱，近似值越差，反之亦然。
In this paper we consider a bipartite system composed of two subsystems each coupled to its own thermal environment. Based on a collision model, we mainly study whether the approximation (i.e., the inter-system interaction is ignored when modeling the system-environment coupling) is valid or not. We also address the problem of heat transport unitedly for both conventional energy-preserving system-environment interactions and non-energy preserving system-environment interactions. For the former interaction, as the inter-system interaction strength increases, at first this approximation gets worse as expected, but then counterintuitively gets better even for a stronger inter-system coupling. For the latter interaction with asymmetry, this approximation gets progressively worse. In this case we realize a perfect thermal rectification, and we can not find apparent rectification effect for the former interaction. Finally and more importantly, our results show that whether this approximation is valid or not is closely related to the quantum correlations between the subsystems, i.e., the weaker the quantum correlations, the more justified the approximation and vice versa.
