Making near-extremal wormholes traversable

Abstract

We construct a traversable wormhole from a charged AdS black hole by adding a coupling between the two boundary theories. We investigate how the effect of this deformation behaves in the extremal limit of the black hole. The black holes have finite entropy but an infinitely long throat in the extremal limit. We argue that it is still possible to make the throat traversable even in the extremal limit, but this requires either tuning the field for which we add a boundary coupling close to an instability threshold or scaling the strength of the coupling inversely with the temperature. In the latter case we show that the amount of information that can be sent through the wormhole scales with the entropy.

arXiv comment18 pages. V2: minor changes; v3, v4: minor edits in response to referee comments

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• Traversability of Multi-Boundary Wormholes
• Holographic teleportation in higher dimensions
• Worldsheet traversable wormholes
• Traversable wormholes via a double trace deformation involving $U(1)$ conserved current operators
• How to Make Traversable Wormholes: Eternal AdS${}_4$ Wormholes from Coupled CFT's