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Making near-extremal wormholes traversable

Fallows, Seamus; Ross, Simon F.

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Seamus Fallows
PGR Student Doctor of Philosophy


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.


Fallows, S., & Ross, S. F. (2020). Making near-extremal wormholes traversable. Journal of High Energy Physics, 2020(12), Article 44.

Journal Article Type Article
Acceptance Date Oct 27, 2020
Online Publication Date Dec 7, 2020
Publication Date 2020
Deposit Date Mar 16, 2021
Publicly Available Date Oct 21, 2021
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2020
Issue 12
Article Number 44


Published Journal Article (488 Kb)

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Copyright Statement
Open Access . This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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