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arXiv 2201.11730hep-thgr-qcquant-ph
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反射熵的 Page 曲线

The Page Curve for Reflected Entropy

Chris Akers, Thomas Faulkner, Simon Lin, Pratik Rath

AI总结:

本文在 West Coast Model 中研究反射熵的 Page 曲线,通过引力路径积分解析得到反射纠缠谱,揭示面积涨落对相变的平滑作用及 Rényi 参数对相变位置的影响。

摘要:

我们在 West Coast Model 中研究反射熵 $S_R$,该模型是一个黑洞蒸发的玩具模型,由与世界末日膜耦合的 JT 引力构成。我们证明了在远离相变时,将其与纠缠楔截面联系起来的全息对偶的有效性。此外,我们分析了消除 $S_R$ 相变中不连续性的重要非微扰效应。通过执行引力路径积分,我们解析地得到了反射纠缠谱。该谱具有由超选择扇区组成的简单形式,我们将其解释为几何的直和:一个不连通几何和一个涉及闭合宇宙的连通几何。我们发现,$O(\sqrt{G_N})$ 的面积涨落展宽了正则系综中的 $S_R$ 相变,这类似于纠缠熵相变。我们还考虑了反射熵的 Rényi 推广,并表明相变位置随 Rényi 参数的函数而变化。

英文摘要:

We study the reflected entropy $S_R$ in the West Coast Model, a toy model of black hole evaporation consisting of JT gravity coupled to end-of-the-world branes. We demonstrate the validity of the holographic duality relating it to the entanglement wedge cross section away from phase transitions. Further, we analyze the important non-perturbative effects that smooth out the discontinuity in the $S_R$ phase transition. By performing the gravitational path integral, we obtain the reflected entanglement spectrum analytically. The spectrum takes a simple form consisting of superselection sectors, which we interpret as a direct sum of geometries, a disconnected one and a connected one involving a closed universe. We find that area fluctuations of $O(\sqrt{G_N})$ spread out the $S_R$ phase transition in the canonical ensemble, analogous to the entanglement entropy phase transition. We also consider a Renyi generalization of the reflected entropy and show that the location of the phase transition varies as a function of the Renyi parameter.

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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