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Half-wormholes in nearly AdS$_2$ holography

by Antonio M. García-García, Victor Godet

Submission summary

As Contributors: Victor Godet
Preprint link: scipost_202109_00031v2
Date submitted: 2022-01-15 07:51
Submitted by: Godet, Victor
Submitted to: SciPost Physics
Academic field: Physics
Specialties:
  • High-Energy Physics - Theory
Approaches: Theoretical, Computational

Abstract

We find half-wormhole solutions in Jackiw-Teitelboim gravity by allowing the geometry to end on a spacetime D-brane with specific boundary conditions. This theory also contains a Euclidean wormhole which leads to a factorization problem. We propose that half-wormholes provide a gravitational picture for how factorization is restored and show that the Euclidean wormhole emerges from averaging over the boundary conditions. The wormhole is known to be dual to a Sachdev-Ye-Kitaev (SYK) model with random complex couplings. We find that the free energy of the half-wormhole is strikingly similar to that of a single realization of this SYK model. These results suggest that the gravitational path integral computes an average over spacetime D-brane boundary conditions.

Current status:
Editor-in-charge assigned


List of changes

minor changes detailed in the replies to the referees

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