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| (Seminar) Saddle-points at Holographic Entanglement Transitions: Enhanced Corrections |
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CAS Key Laboratory of Theoretical Physics
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Institute of Theoretical Physics
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Chinese Academy of Sciences
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Seminar
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Title
题目
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Saddle-points at Holographic Entanglement Transitions: Enhanced Corrections |
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Speaker
报告人
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Affiliation
所在单位
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KITS-UCAS |
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Date
日期
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2:00pm, Oct 27, 2020, Tuesday |
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Venue
地点
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ITP South Building 6620
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Zoom Meeting Room ID: 983 0634 1756
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Contact Person
所内联系人
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Gang Yang |
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Abstract
摘要
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In AdS/CFT, bulk geometries usually manifest as saddle-point objects of the boundary CFT in the holographic limit. The simplest example is the emergence of RT surfaces in computing the boundary entanglement entropy, described by the famous Ryu-Takayanagi (RT) formula. The derivation of RT formula assumes that: 1. there is only one bulk saddle-point that dominates the path-integral; 2. the relevant saddle points respect replica symmetry. In this talk, we examine scenarios where both of these assumptions fail. In particular, we study the entanglement transition for a chaotic black hole micro-state, and focus on the sharpest signature of such transition: the enhanced correction. We discuss the interplay between different saddle-points, especially the replica non-symmetric ones, in relation to the enhanced correction at the transition, and draw general lessons from this case-study. |
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