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Title: Equivalence of emergent de Sitter spaces from conformal field theory

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [3]
  1. Columbia Univ., New York, NY (United States); Columbia University
  2. Columbia Univ., New York, NY (United States); Instituut voor Theoretische Fysica, Leuven (Belgium)
  3. Columbia Univ., New York, NY (United States)

Recently, two groups have made distinct proposals for a de Sitter space that is emergent from conformal field theory (CFT). The first proposal is that, for two-dimensional holographic CFTs, the kinematic space of geodesics on a space-like slice of the asymptotically anti-de Sitter bulk is two-dimensional de Sitter space (dS2), with a metric that can be derived from the entanglement entropy of intervals in the CFT. In the second proposal, de Sitter dynamics emerges naturally from the first law of entanglement entropy for perturbations around the vacuum state of CFTs. We provide support for the equivalence of these two emergent spacetimes in the vacuum case and beyond. In particular, we study the kinematic spaces of nontrivial solutions of 3d gravity, including the BTZ black string, BTZ black hole, and conical singularities. We argue that the resulting spaces are generically globally hyperbolic spacetimes that support dynamics given boundary conditions at future infinity. For the BTZ black string, corresponding to a thermal state of the CFT, we show that both prescriptions lead to an emergent hyperbolic patch of dS2. As a result, we offer a general method for relating kinematic space and the auxiliary de Sitter space that is valid in the vacuum and thermal cases.

Research Organization:
Columbia Univ., New York, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Grant/Contract Number:
SC0011941
OSTI ID:
1360131
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 9 Vol. 2016; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (12)

Topological Complexity in AdS 3 /CFT 2 journal June 2018
Kinematic space and wormholes journal January 2017
Holographic subregion complexity from kinematic space journal January 2019
The gravitational dynamics of kinematic space journal February 2019
A defect in holographic interpretations of tensor networks journal March 2017
Holographic relations for OPE blocks in excited states journal March 2019
Kinematic space and the orbit method journal July 2019
Kinematic space for conical defects journal November 2017
Berry curvature, horocycles, and scattering states in AdS 3 / CFT 2 journal December 2019
Towards a Fisher-Information Description of Complexity in de Sitter Universe journal November 2019
Kinematic space for conical defects text January 2017
Holographic relations for OPE blocks in excited states text January 2018

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