Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/128217
Title: Black holes and the multiverse
Author: Garriga Torres, Jaume
Vilenkin, Alexander
Zhang, Jun
Keywords: Forats negres (Astronomia)
Black holes (Astronomy)
Issue Date: 25-Feb-2016
Publisher: Institute of Physics (IOP)
Abstract: Vacuum bubbles may nucleate and expand during the inflationary epoch in the early universe. After inflation ends, the bubbles quickly dissipate their kinetic energy; they come to rest with respect to the Hubble flow and eventually form black holes. The fate of the bubble itself depends on the resulting black hole mass. If the mass is smaller than a certain critical value, the bubble collapses to a singularity. Otherwise, the bubble interior inflates, forming a baby universe, which is connected to the exterior FRW region by a wormhole. A similar black hole formation mechanism operates for spherical domain walls nucleating during inflation. As an illustrative example, we studied the black hole mass spectrum in the domain wall scenario, assuming that domain walls interact with matter only gravitationally. Our results indicate that, depending on the model parameters, black holes produced in this scenario can have significant astrophysical effects and can even serve as dark matter or as seeds for supermassive black holes. The mechanism of black hole formation described in this paper is very generic and has important implications for the global structure of the universe. Baby universes inside super-critical black holes inflate eternally and nucleate bubbles of all vacua allowed by the underlying particle physics. The resulting multiverse has a very non-trivial spacetime structure, with a multitude of eternally inflating regions connected by wormholes. If a black hole population with the predicted mass spectrum is discovered, it could be regarded as evidence for inflation and for the existence of a multiverse.
Note: Reproducció del document publicat a: https://doi.org/10.1088/1475-7516/2016/02/064
It is part of: Journal of Cosmology and Astroparticle Physics, 2016, vol. 064, num. 02
Related resource: https://doi.org/10.1088/1475-7516/2016/02/064
URI: http://hdl.handle.net/2445/128217
ISSN: 1475-7516
Appears in Collections:Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))
Articles publicats en revistes (Física Quàntica i Astrofísica)

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