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Bouncing unitary cosmology II. Mini-superspace phenomenology: Mini-Superspace Phenomenology

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Bouncing unitary cosmology II. Mini-superspace phenomenology : Mini-Superspace Phenomenology. / Gryb, Sean; Thébault, Karim P.Y.

In: Classical and Quantum Gravity, Vol. 36, No. 3, 035010, 18.01.2019.

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@article{7e19bb8a5af54bedae4f1ec9fcc9af9f,
title = "Bouncing unitary cosmology II. Mini-superspace phenomenology: Mini-Superspace Phenomenology",
abstract = "A companion paper provides a proposal for cosmic singularity resolution based upon general features of a bouncing unitary cosmological model in the mini-superspace approximation. This paper analyses novel phenomenology that can be identified within particular solutions of that model. First, we justify our choice of particular solutions based upon a clearly articulated and observationally-motivated principle. Second, we demonstrate that the chosen solutions follow a classical mini-superspace cosmology before smoothly bouncing off the classically singular region. Third, and most significantly, we identify a 'Rayleigh-scattering' limit for physically reasonable choices of parameters within which the solutions display effective behaviour that is insensitive to the details of rapidly oscillating Planck-scale physics. This effective physics is found to be compatible with an effective period of cosmic inflation well below the Planck scale. The detailed effective physics of this Rayleigh-scattering limit is provided via: i) an exact analytical treatment of the model in the de Sitter limit; and ii) numerical solutions of the full model.",
keywords = "bouncing cosmology, cosmological constant, problem of time, quantum cosmology, singularity resolution",
author = "Sean Gryb and Th{\'e}bault, {Karim P.Y.}",
year = "2019",
month = "1",
day = "18",
doi = "10.1088/1361-6382/aaf837",
language = "English",
volume = "36",
journal = "Classical and Quantum Gravity",
issn = "0264-9381",
publisher = "IOP Publishing",
number = "3",

}

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TY - JOUR

T1 - Bouncing unitary cosmology II. Mini-superspace phenomenology

T2 - Mini-Superspace Phenomenology

AU - Gryb, Sean

AU - Thébault, Karim P.Y.

PY - 2019/1/18

Y1 - 2019/1/18

N2 - A companion paper provides a proposal for cosmic singularity resolution based upon general features of a bouncing unitary cosmological model in the mini-superspace approximation. This paper analyses novel phenomenology that can be identified within particular solutions of that model. First, we justify our choice of particular solutions based upon a clearly articulated and observationally-motivated principle. Second, we demonstrate that the chosen solutions follow a classical mini-superspace cosmology before smoothly bouncing off the classically singular region. Third, and most significantly, we identify a 'Rayleigh-scattering' limit for physically reasonable choices of parameters within which the solutions display effective behaviour that is insensitive to the details of rapidly oscillating Planck-scale physics. This effective physics is found to be compatible with an effective period of cosmic inflation well below the Planck scale. The detailed effective physics of this Rayleigh-scattering limit is provided via: i) an exact analytical treatment of the model in the de Sitter limit; and ii) numerical solutions of the full model.

AB - A companion paper provides a proposal for cosmic singularity resolution based upon general features of a bouncing unitary cosmological model in the mini-superspace approximation. This paper analyses novel phenomenology that can be identified within particular solutions of that model. First, we justify our choice of particular solutions based upon a clearly articulated and observationally-motivated principle. Second, we demonstrate that the chosen solutions follow a classical mini-superspace cosmology before smoothly bouncing off the classically singular region. Third, and most significantly, we identify a 'Rayleigh-scattering' limit for physically reasonable choices of parameters within which the solutions display effective behaviour that is insensitive to the details of rapidly oscillating Planck-scale physics. This effective physics is found to be compatible with an effective period of cosmic inflation well below the Planck scale. The detailed effective physics of this Rayleigh-scattering limit is provided via: i) an exact analytical treatment of the model in the de Sitter limit; and ii) numerical solutions of the full model.

KW - bouncing cosmology

KW - cosmological constant

KW - problem of time

KW - quantum cosmology

KW - singularity resolution

UR - http://www.scopus.com/inward/record.url?scp=85060226570&partnerID=8YFLogxK

U2 - 10.1088/1361-6382/aaf837

DO - 10.1088/1361-6382/aaf837

M3 - Article

VL - 36

JO - Classical and Quantum Gravity

JF - Classical and Quantum Gravity

SN - 0264-9381

IS - 3

M1 - 035010

ER -