Evolution of universes in causal set cosmology

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Title: Evolution of universes in causal set cosmology
Author(s): Dowker, F
Zalel, S
Item Type: Journal Article
Abstract: The causal set approach to the problem of quantum gravity is based on the hypothesis that spacetime is fundamentally discrete. Spacetime discreteness opens the door to novel types of dynamical law for cosmology and the Classical Sequential Growth (CSG) models of Rideout and Sorkin form an interesting class of such laws. It has been shown that a renormalisation of the dynamical parameters of a CSG model occurs whenever the universe undergoes a Big Crunch–Big Bang bounce. In this paper we propose a way to model the creation of a new universe after the singularity of a black hole. We show that renormalisation of dynamical parameters occurs in a CSG model after such a creation event. We speculate that this could realise aspects of Smolin's Cosmological Natural Selection proposal.
Publication Date: 27-Mar-2017
Date of Acceptance: 1-Mar-2017
URI: http://hdl.handle.net/10044/1/49656
DOI: https://dx.doi.org/10.1016/j.crhy.2017.03.002
ISSN: 1631-0705
Publisher: Elsevier Masson
Start Page: 246
End Page: 253
Journal / Book Title: Comptes Rendus Physique
Volume: 18
Issue: 3-4
Sponsor/Funder: Science and Technology Facilities Council (STFC)
Funder's Grant Number: ST/L00044X/1
Copyright Statement: © 2017 Académie des sciences. Published by Elsevier Masson SAS. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords: Science & Technology
Physical Sciences
Astronomy & Astrophysics
Physics, Multidisciplinary
Physics
Quantum gravity
Causal sets
Cosmology
QUANTUM-GRAVITY
SPACE-TIME
gr-qc
gr-qc
01 Mathematical Sciences
02 Physical Sciences
Fluids & Plasmas
Publication Status: Published
Appears in Collections:Physics
Theoretical Physics
Faculty of Natural Sciences



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