Journal
PHYSICS LETTERS B
Volume 779, Issue -, Pages 214-222Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2018.02.010
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Funding
- Infosys Foundation
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We study extremal surfaces in the static patch coordinatization of de Sitter space, focusingon the future and past universes. We find connected timelike codim-2 surfaces on a boundary Euclidean time slice stretching from the future boundary I+ to the past boundary I-. In a limit, these surfaces pass through the bifurcation region and have minimal area with a divergent piece alone, whose coefficient is de Sitter entropy in 4-dimensions. These are reminiscent of rotated versions of certain surfaces in the AdS black hole. We close with some speculations on a possible dS/CFT interpretation of 4-dim de Sitter space as dual to two copies of ghost-CFTs in an entangled state. For a simple toy model of two copies of ghost-spin chains, we argue that similar entangled states always have positive norm and positive entanglement. (C) 2018 The Author. Published by Elsevier B.V.
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