Cosmic ER=EPR in dS/CFT

TL;DR

This paper demonstrates that in the dS/CFT correspondence, the Euclidean vacuum corresponds to a thermofield double state, and the de Sitter geometry emerges from entanglement between two dual CFT copies, with implications for understanding quantum gravity.

Contribution

It shows that the Euclidean vacuum in dS/CFT is a thermofield double state, linking entanglement to the emergence of de Sitter geometry.

Findings

Euclidean vacuum is a thermofield double state in dual CFT

De Sitter geometry emerges from entanglement between CFT copies

Tracing over one CFT yields a thermal state for a static causal diamond

Abstract

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.