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arXiv 1804.05855hep-thgr-qc
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纠缠楔重构与纠缠纯化

Entanglement Wedge Reconstruction and Entanglement of Purification

Ricardo Espíndola, Alberto Guijosa, Juan F. Pedraza

摘要:

在全息对应中,子区域对偶性假定边界理论中有限类空区域的混合态的知识允许完全重建体块的特定区域,称为纠缠楔。这一说法已被证明为当地散装经营者。在本文中,专门首先为简单的一个Rindler楔形的AdS $_3$,我们发现,通用曲线内的楔形实际上是不完全重建与纠缠熵在相应的边界区域,即使使用最一般的变体全息,这是最近被证明足以重建任意类空曲线的庞加莱补丁。这种限制类似于我们熟悉的纠缠阴影现象,我们称之为“纠缠阴影”。我们克服了它的不可重构的曲线段的信息被编码在一个轻微的概括的概念纠缠的净化,其全息对偶最近已经讨论过。我们介绍的概念“差分净化”,并证明,在结合微分熵,它使完整的重建所有类空曲线内的任意纠缠楔在任何3维散装几何。

英文摘要:

In the holographic correspondence, subregion duality posits that knowledge of the mixed state of a finite spacelike region of the boundary theory allows full reconstruction of a specific region of the bulk, known as the entanglement wedge. This statement has been proven for local bulk operators. In this paper, specializing first for simplicity to a Rindler wedge of AdS$_3$, we find that generic curves within the wedge are in fact not fully reconstructible with entanglement entropies in the corresponding boundary region, even after using the most general variant of hole-ography, which was recently shown to suffice for reconstruction of arbitrary spacelike curves in the Poincare patch. This limitation is an analog of the familiar phenomenon of entanglement shadows, which we call 'entanglement shade'. We overcome it by showing that the information about the nonreconstructible curve segments is encoded in a slight generalization of the concept of entanglement of purification, whose holographic dual has been discussed very recently. We introduce the notion of 'differential purification', and demonstrate that, in combination with differential entropy, it enables the complete reconstruction of all spacelike curves within an arbitrary entanglement wedge in any 3-dimensional bulk geometry.

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