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arXiv 1905.00577hep-thmath.OAquant-ph
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纠缠楔截面的正则纯化

A canonical purification for the entanglement wedge cross-section

Souvik Dutta, Thomas Faulkner

摘要:

在AdS/CFT中,我们考虑一类称为反射极小曲面的纠缠楔内的体几何量。这些表面的面积是与正则纯化(GNS态)相关的纠缠熵的对偶,我们称之为反射熵。从散装的角度来看,我们表明,反射的最小表面的面积的一半给出了纠缠楔截面的概念的重新解释。我们证明了反射熵的一些一般性质,并在CFTs中引入了一种新的复制技巧来研究它。我们还考虑了一个明确的全息建设的规范净化,介绍了恩格尔哈特和墙,反射极小曲面简单RT表面在这个新的时空。我们对比我们的结果与纠缠的净化猜想,最后评论的连续极限,我们发现一个关系到分裂属性:反射熵计算冯诺伊曼熵的典型分裂I型因子介绍了Doplicher和Longo。

英文摘要:

In AdS/CFT we consider a class of bulk geometric quantities inside the entanglement wedge called reflected minimal surfaces. The areas of these surfaces are dual to the entanglement entropy associated to a canonical purification (the GNS state) that we dub the reflected entropy. From the bulk point of view, we show that half the area of the reflected minimal surface gives a reinterpretation of the notion of the entanglement wedge cross-section. We prove some general properties of the reflected entropy and introduce a novel replica trick in CFTs for studying it. The duality is established using a recently introduced approach to holographic modular flow. We also consider an explicit holographic construction of the canonical purification, introduced by Engelhardt and Wall; the reflected minimal surfaces are simply RT surfaces in this new spacetime. We contrast our results with the entanglement of purification conjecture, and finally comment on the continuum limit where we find a relation to the split property: the reflected entropy computes the von Neumann entropy of a canonical splitting type-I factor introduced by Doplicher and Longo.

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