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Half-wormholes in nearly AdS$_2$ holography

by Antonio M. García-García, Victor Godet

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Submission summary

Authors (as registered SciPost users): Victor Godet
Submission information
Preprint Link: scipost_202109_00031v3  (pdf)
Date accepted: 2022-03-31
Date submitted: 2022-03-24 09:59
Submitted by: Godet, Victor
Submitted to: SciPost Physics
Ontological classification
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.

Author comments upon resubmission

Minor revisions

Published as SciPost Phys. 12, 135 (2022)

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