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arXiv 2001.101702020-01hep-th

A note on the kinematic space associated with a subregion

Xing Huang

备注：: 28 pages, 7 figures. v2: minor clarifications and references added, typos fixed

英文摘要：

We discuss the issue in constructing the kinematic space of the geodesics lying partially inside the entanglement wedge associated with a single interval. We then resolve the problem by working with the equivalent kinematic space of the reflected geodesics. We also show that the length of a reflected geodesic corresponds to the (generalized) reflected entropy, which can be computed using entirely the information obtained from the reduced density matrix, satisfying the requirement of the subregion-subregion duality.

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