Linearity of holographic entanglement entropy
- Stanford Univ., CA (United States). Inst. for Theoretical Physics, Dept. of Physics
- Inst. for Advanced Study, Princeton, NJ (United States). School of Natural Sciences
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., CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Contributing Organization:
- Princeton Univ., NJ (United States)
- Grant/Contract Number:
- SC0009988; PHY-1316699
- OSTI ID:
- 1358372
- Alternate ID(s):
- OSTI ID: 1356081
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2017, Issue 2; 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
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Universal local operator quenches and entanglement entropy
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journal | November 2019 |
The Ryu-Takayanagi Formula from Quantum Error Correction | text | January 2016 |
Toward a Holographic Theory for General Spacetimes | text | January 2016 |
Holographic Renyi Entropy from Quantum Error Correction | text | January 2018 |
Universal Local Operator Quenches and Entanglement Entropy | text | January 2019 |
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