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Making near-extremal wormholes traversable

Fallows, Seamus and Ross, Simon F. (2020) 'Making near-extremal wormholes traversable.', Journal of high energy physics., 2020 (12). 044.


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.

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Publisher 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.
Date accepted:27 October 2020
Date deposited:21 October 2021
Date of first online publication:07 December 2020
Date first made open access:21 October 2021

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