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arXiv 2011.09622hep-thgr-qc
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纠缠熵的微扰计算

Perturbative calculations of entanglement entropy

Pouria Dadras, Alexei Kitaev

摘要:

本文试图将最近对蒸发黑洞的Page曲线的理解扩展到更一般的热浴系统。虽然用复制品技巧计算冯诺伊曼熵通常是一个挑战,但我们已经确定了两种可解决的情况。对于Page曲线的初始部分,我们总结了系统浴耦合$κ$中的扰动序列;最有趣的贡献是$2s$阶,其中$s$是副本的数量。对于饱和制度,我们认为在稍后的时间熵的外部脉冲的效果,并将其与OTOC。一个显着的简化发生在最大的混乱的情况下,这样的效果可以解释在一个中间对象,类似于一个副本虫洞的分支表面。

英文摘要:

This paper is an attempt to extend the recent understanding of the Page curve for evaporating black holes to more general systems coupled to a heat bath. Although calculating the von Neumann entropy by the replica trick is usually a challenge, we have identified two solvable cases. For the initial section of the Page curve, we sum up the perturbation series in the system-bath coupling $κ$; the most interesting contribution is of order $2s$, where $s$ is the number of replicas. For the saturated regime, we consider the effect of an external impulse on the entropy at a later time and relate it to OTOCs. A significant simplification occurs in the maximal chaos case such that the effect may be interpreted in terms of an intermediate object, analogous to the branching surface of a replica wormhole.

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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