A TOY MODEL FOR A BABY UNIVERSE INSIDE A BLACK HOLE
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Date
2020-05
Authors
Chakrabarty, Hrishikesh
Abdujabbarov, Ahmadjon
Malafarina, Daniele
Bambi, Cosimo
Journal Title
Journal ISSN
Volume Title
Publisher
Springer Verlag
Abstract
We present a dynamical toy model for an expanding universe inside a black hole. The model is built by matching a spherically symmetric collapsing matter cloud to an expanding Friedmann–Robertson–Walker universe through a phase transition that occurs in the quantum-gravity dominated region, here modeled with semi-classical corrections at high density. The matching is performed on a space-like hyper-surface identified by the co-moving time at which quantum–gravity induced effects halt collapse. The purpose of the model is to suggest a possible reconciliation between the observation that black holes are well described by the classical solutions and the fact that the theoretical resolution of space–time singularities leads to a bounce for the collapsing matter.
Description
Keywords
black hole, baby universe, toy model, Research Subject Categories::NATURAL SCIENCES, Research Subject Categories::NATURAL SCIENCES::Physics
Citation
Chakrabarty, H., Abdujabbarov, A., Malafarina, D., & Bambi, C. (2020). A toy model for a baby universe inside a black hole. The European Physical Journal C, 80(5). https://doi.org/10.1140/epjc/s10052-020-7964-0