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Title: Linearity of holographic entanglement entropy

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [3]
  1. Stanford Univ., Stanford, CA (United States); Stanford University
  2. Institute for Advanced Study, Princeton, NJ (United States)
  3. Stanford Univ., Stanford, CA (United States)

Here, we consider the question of whether the leading contribution to the entanglement entropy in holographic CFTs is truly given by the expectation value of a linear operator as is suggested by the Ryu-Takayanagi formula. We investigate this property by computing the entanglement entropy, via the replica trick, in states dual to superpositions of macroscopically distinct geometries and find it consistent with evaluating the expectation value of the area operator within such states. However, we find that this fails once the number of semi-classical states in the superposition grows exponentially in the central charge of the CFT. Moreover, in certain such scenarios we find that the choice of surface on which to evaluate the area operator depends on the density matrix of the entire CFT. This nonlinearity is enforced in the bulk via the homology prescription of Ryu-Takayanagi. We thus conclude that the homology constraint is not a linear property in the CFT. We also discuss the existence of entropy operators in general systems with a large number of degrees of freedom.

Research Organization:
Stanford Univ., Stanford, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0009988
OSTI ID:
1356081
Alternate ID(s):
OSTI ID: 1358372; OSTI ID: 22659001
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 2 Vol. 2017; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English

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The Ryu–Takayanagi Formula from Quantum Error Correction journal May 2017
Toward a Holographic Theory for General Spacetimes text January 2016
Detecting topology change via correlations and entanglement from gauge/gravity correspondence journal March 2018
Spacetime from unentanglement journal May 2018
The Ryu-Takayanagi Formula from Quantum Error Correction text January 2016
Towards a bit threads derivation of holographic entanglement of purification journal July 2019
Holographic Renyi Entropy from Quantum Error Correction text January 2018
Toward a holographic theory for general spacetimes journal April 2017
Universal local operator quenches and entanglement entropy journal November 2019
Pulling the boundary into the bulk journal July 2018
Holographic Renyi entropy from quantum error correction journal May 2019
Universal Local Operator Quenches and Entanglement Entropy text January 2019