Lookup NU author(s): Dr Kate Marshall,
Professor Ian Moss
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
We study the negative modes of gravitational instantons representing vacuum decay in asymptotically flat space-time. We consider two different vacuum decay scenarios: the Coleman-de Luccia O(4)-symmetric bubble, and O(3)XR instantons with a static black hole. In spite of the similarities between the models, we find qualitatively different behaviors. In the O(4)-symmetric case, the number of negative modes is known to be either one or infinite, depending on the sign of the kinetic term in the quadratic action. In contrast, solving the mode equation numerically for the static black hole instanton, we find only one negative mode with the kinetic term always positive outside the event horizon. The absence of additional negative modes supports the interpretation of these solutions as giving the tunneling rate for false vacuum decay seeded by microscopic black holes.
Author(s): Gregory R, Marshall KM, Michel F, Moss IG
Publication type: Article
Publication status: Published
Journal: Physical Review D
Online publication date: 19/10/2018
Acceptance date: 07/08/2018
Date deposited: 30/10/2018
ISSN (print): 2470-0010
ISSN (electronic): 2470-0029
Publisher: American Physical Society
Altmetrics provided by Altmetric