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Black holes as bubble nucleation sites

Black holes as bubble nucleation sites
Black holes as bubble nucleation sites
We consider the effect of inhomogeneities on the rate of false vacuum decay. Modelling the inhomogeneity by a black hole, we construct explicit Euclidean instantons which describe the nucleation of a bubble of true vacuum centred on the inhomogeneity. We find that inhomogeneity significantly enhances the nucleation rate over that of the Coleman-de Luccia instanton — the black hole acts as a nucleation site for the bubble. The effect is larger than previously believed due to the contributions to the action from conical singularities. For a sufficiently low initial mass, the original black hole is replaced by flat space during this process, as viewed by a single causal patch observer. Increasing the initial mass, we find a critical value above which a black hole remnant survives the process. This resulting black hole can have a higher mass than the original black hole, but always has a lower entropy. We compare the process to bubble-to-bubble transitions, where there is a semi-classical Lorentzian description in the WKB approximation.
Black Holes, Solitons Monopoles and Instantons
Gregory, Ruth
04ee921b-67a6-4dd1-a90a-0735022b1a77
Moss, Ian G.
6f5f0321-1e9c-4f03-a714-50141129ed06
Withers, Benjamin
e510375b-c5d2-4d5f-bd68-40ace13f0ec9
Gregory, Ruth
04ee921b-67a6-4dd1-a90a-0735022b1a77
Moss, Ian G.
6f5f0321-1e9c-4f03-a714-50141129ed06
Withers, Benjamin
e510375b-c5d2-4d5f-bd68-40ace13f0ec9

Gregory, Ruth, Moss, Ian G. and Withers, Benjamin (2014) Black holes as bubble nucleation sites. Journal of High Energy Physics, 2014 (03). (doi:10.1007/JHEP03(2014)081).

Record type: Article

Abstract

We consider the effect of inhomogeneities on the rate of false vacuum decay. Modelling the inhomogeneity by a black hole, we construct explicit Euclidean instantons which describe the nucleation of a bubble of true vacuum centred on the inhomogeneity. We find that inhomogeneity significantly enhances the nucleation rate over that of the Coleman-de Luccia instanton — the black hole acts as a nucleation site for the bubble. The effect is larger than previously believed due to the contributions to the action from conical singularities. For a sufficiently low initial mass, the original black hole is replaced by flat space during this process, as viewed by a single causal patch observer. Increasing the initial mass, we find a critical value above which a black hole remnant survives the process. This resulting black hole can have a higher mass than the original black hole, but always has a lower entropy. We compare the process to bubble-to-bubble transitions, where there is a semi-classical Lorentzian description in the WKB approximation.

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More information

Published date: March 2014
Keywords: Black Holes, Solitons Monopoles and Instantons
Organisations: Mathematical Sciences

Identifiers

Local EPrints ID: 369317
URI: https://eprints.soton.ac.uk/id/eprint/369317
PURE UUID: e7a04f06-5e31-4060-bbc2-f53ee51cdd96

Catalogue record

Date deposited: 23 Sep 2014 13:22
Last modified: 08 Nov 2019 17:31

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