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arXiv 2111.04050quant-phgr-qchep-th
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粒子探测器与热浴相互作用中的熵产生和相关扩展

Entropy production and correlation spreading in the interaction between particle detector and thermal baths

Hao Xu, Si Yu Chen

摘要:

熵的产生是热力学第二定律的关键,它是通过考虑系统$S$和热环境$E$的联合么正演化来定义的。然而,由于系统和环境的初始状态和哈密顿量的多样性,很难评价熵产生的特性。在目前的工作中,我们提出的$S$和$E$的演化可以解决高斯量子力学(GQM)的框架下的非微扰。研究了类Unruh-DeWitt粒子探测器与热池相互作用中的熵产生和关联扩展,其中粒子探测器为谐振子,热池由相互作用和非相互作用的高斯态组成.我们可以观察到,熵产生隐含着量子递归性,并表现出周期性。在相互作用池的情况下,关联在周期系统中传播,并导致初始状态的复苏。我们的分析可以扩展到GQM框架下的任何其他模型,它也可能揭示一些光的AdS/CFT对应。

英文摘要:

Entropy production is the key to the second law of thermodynamics, and it is well defined by considering a joint unitary evolution of a system $S$ and a thermal environment $E$. However, due to the diversity of the initial state and Hamiltonian of the system and environment, it is hard to evaluate the characterisation of entropy production. In the present work, we propose that the evolution of $S$ and $E$ can be solved non-perturbatively in the framework of Gaussian quantum mechanics (GQM). We study the entropy production and correlation spreading in the interaction between Unruh-DeWitt-like particle detector and thermal baths, where the particle detector is set to be a harmonic oscillator and the thermal baths are made of interacting and noninteracting Gaussian states. We can observe that the entropy production implies quantum recurrence and shows periodicity. In the case of interacting bath, the correlation propagates in a periodic system and leads to a revival of the initial state. Our analysis can be extended to any other models in the framework of GQM, and it may also shed some light on the AdS/CFT correspondence.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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