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T-Model Inflation and Bouncing Cosmology

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T-Model Inflation and Bouncing Cosmology. / Sloan, David; Dimopoulos, Konstantinos; Karamitsos, Sotirios.
In: Physical Review D, Vol. 101, No. 4, 043521, 14.02.2020.

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Sloan D, Dimopoulos K, Karamitsos S. T-Model Inflation and Bouncing Cosmology. Physical Review D. 2020 Feb 14;101(4):043521. doi: 10.1103/PhysRevD.101.043521

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Bibtex

@article{6ba6639ed777454986f695f88da78c71,
title = "T-Model Inflation and Bouncing Cosmology",
abstract = "We examine the dynamics of a closed cosmology whose matter source is that of a conformally coupled scalar field with a broken SO(1, 1) symmetry, which correspond to the α-attractors proposed by Linde and Kallosh. Following a field redefinition, such models give rise to “T-model” inflationary potentials, whose dynamics provide both an inflationary phase and a classical bounce. We show that the universe can undergo bounces far from the regime of quantum gravity (i.e. at energy densities lower than the Planck density). We analyse perturbations on this background with particular attention given to the effects of a double-bouncing scenario (with rapid recollapse between bounces) on the long wavelength modes. We demonstrate that the predictions of such models agree well with observations and might explain the suppression of power in the low multiples of the CMB.",
author = "David Sloan and Konstantinos Dimopoulos and Sotirios Karamitsos",
year = "2020",
month = feb,
day = "14",
doi = "10.1103/PhysRevD.101.043521",
language = "English",
volume = "101",
journal = "Physical Review D",
issn = "1550-7998",
publisher = "American Physical Society",
number = "4",

}

RIS

TY - JOUR

T1 - T-Model Inflation and Bouncing Cosmology

AU - Sloan, David

AU - Dimopoulos, Konstantinos

AU - Karamitsos, Sotirios

PY - 2020/2/14

Y1 - 2020/2/14

N2 - We examine the dynamics of a closed cosmology whose matter source is that of a conformally coupled scalar field with a broken SO(1, 1) symmetry, which correspond to the α-attractors proposed by Linde and Kallosh. Following a field redefinition, such models give rise to “T-model” inflationary potentials, whose dynamics provide both an inflationary phase and a classical bounce. We show that the universe can undergo bounces far from the regime of quantum gravity (i.e. at energy densities lower than the Planck density). We analyse perturbations on this background with particular attention given to the effects of a double-bouncing scenario (with rapid recollapse between bounces) on the long wavelength modes. We demonstrate that the predictions of such models agree well with observations and might explain the suppression of power in the low multiples of the CMB.

AB - We examine the dynamics of a closed cosmology whose matter source is that of a conformally coupled scalar field with a broken SO(1, 1) symmetry, which correspond to the α-attractors proposed by Linde and Kallosh. Following a field redefinition, such models give rise to “T-model” inflationary potentials, whose dynamics provide both an inflationary phase and a classical bounce. We show that the universe can undergo bounces far from the regime of quantum gravity (i.e. at energy densities lower than the Planck density). We analyse perturbations on this background with particular attention given to the effects of a double-bouncing scenario (with rapid recollapse between bounces) on the long wavelength modes. We demonstrate that the predictions of such models agree well with observations and might explain the suppression of power in the low multiples of the CMB.

U2 - 10.1103/PhysRevD.101.043521

DO - 10.1103/PhysRevD.101.043521

M3 - Journal article

VL - 101

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 4

M1 - 043521

ER -