arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1306.4682hep-th
收藏

超越经典引力的全息纠缠

Holographic entanglement beyond classical gravity

Taylor Barrella, Xi Dong, Sean A. Hartnoll, Victoria L. Martin

摘要:

通过显式构造与边界几何分支覆盖对偶的体时空,可以计算1+ 1CFTs的Renyi熵和纠缠熵.在经典水平上,最近已经证明,在体再现的全息纠缠熵的修正Ryu-Takayanagi公式。我们研究了该公式的单圈体修正。在散装几何形状的功能决定因素是由一个总和超过某些单词的生成器的肖特基群的分支覆盖。对于直线上两个不相交区间的情形,我们得到了小交比展开时单圈纠缠熵的解析解。这些复制和超越预期的普遍条款是不可见的经典在批量。我们还考虑了有限温度下圆上单个区间的情形。在高温下,我们表明,一个循环的贡献,引入预期的有限尺寸修正的纠缠熵,不存在经典。在低温下,单回路修正捕获了密度矩阵的混合性质,这在霍金-佩奇温度以下也是经典不可见的。

英文摘要:

The Renyi entropies and entanglement entropy of 1+1 CFTs with gravity duals can be computed by explicit construction of the bulk spacetimes dual to branched covers of the boundary geometry. At the classical level in the bulk this has recently been shown to reproduce the conjectured Ryu-Takayanagi formula for the holographic entanglement entropy. We study the one-loop bulk corrections to this formula. The functional determinants in the bulk geometries are given by a sum over certain words of generators of the Schottky group of the branched cover. For the case of two disjoint intervals on a line we obtain analytic answers for the one-loop entanglement entropy in an expansion in small cross-ratio. These reproduce and go beyond anticipated universal terms that are not visible classically in the bulk. We also consider the case of a single interval on a circle at finite temperature. At high temperatures we show that the one-loop contributions introduce expected finite size corrections to the entanglement entropy that are not present classically. At low temperatures, the one-loop corrections capture the mixed nature of the density matrix, also not visible classically below the Hawking-Page temperature.

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。

↑