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Cosmic ER=EPR in dS/CFT
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In the dS/CFT correspondence, bulk states on global spacelike slices of de Sitter space are dual to (in general) entangled states in the tensor product of the dual CFT Hilbert space with itself. We show, using a quasinormal mode basis, that the Euclidean vacuum (for free scalars in a certain mass range) is a thermofield double state in the dual CFT description, and that the global de Sitter geometry emerges from quantum entanglement between two copies of the CFT. Tracing over one copy of the CFT produces a mixed thermal state describing a single static causal diamond.
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de Sitter holography from a Lorentzian torus
A new holographic duality is proposed: quantum gravity on a two-time version of de Sitter space is dual to a conformal field theory on a Lorentzian torus, reproducing de Sitter entropy, correlators, and pseudoentropy.
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