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Title: Dynamics of cosmological perturbations and reheating in the anamorphic universe

Abstract

We discuss scalar-tensor realizations of the Anamorphic cosmological scenario recently proposed by Ijjas and Steinhardt [1]. Through an analysis of the dynamics of cosmological perturbations we obtain constraints on the parameters of the model. We also study gravitational Parker particle production in the contracting Anamorphic phase and we compute the fraction between the energy density of created particles at the end of the phase and the background energy density. We find that, as in the case of inflation, a new mechanism is required to reheat the universe.

Authors:
; ;  [1];  [2]
  1. Physics Department, McGill University, Montreal, QC, H3A 2T8 (Canada)
  2. Departamento de Ciências Naturais, Universidade Federal do Espírito Santo, Rodovia BR 101 Norte, km. 60, São Mateus, ES (Brazil)
Publication Date:
OSTI Identifier:
22679941
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2017; Journal Issue: 04; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGICAL MODELS; DISTURBANCES; ENERGY DENSITY; PARTICLE PRODUCTION; PERTURBATION THEORY; UNIVERSE

Citation Formats

Graef, L.L., Ferreira, Elisa G.M., Brandenberger, Robert, and Hipólito-Ricaldi, W.S., E-mail: leilagraef@on.br, E-mail: wiliam.ricaldi@ufes.br, E-mail: elisa.ferreira@mail.mcgill.ca, E-mail: rhb@physics.mcgill.ca. Dynamics of cosmological perturbations and reheating in the anamorphic universe. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/04/004.
Graef, L.L., Ferreira, Elisa G.M., Brandenberger, Robert, & Hipólito-Ricaldi, W.S., E-mail: leilagraef@on.br, E-mail: wiliam.ricaldi@ufes.br, E-mail: elisa.ferreira@mail.mcgill.ca, E-mail: rhb@physics.mcgill.ca. Dynamics of cosmological perturbations and reheating in the anamorphic universe. United States. doi:10.1088/1475-7516/2017/04/004.
Graef, L.L., Ferreira, Elisa G.M., Brandenberger, Robert, and Hipólito-Ricaldi, W.S., E-mail: leilagraef@on.br, E-mail: wiliam.ricaldi@ufes.br, E-mail: elisa.ferreira@mail.mcgill.ca, E-mail: rhb@physics.mcgill.ca. Sat . "Dynamics of cosmological perturbations and reheating in the anamorphic universe". United States. doi:10.1088/1475-7516/2017/04/004.
@article{osti_22679941,
title = {Dynamics of cosmological perturbations and reheating in the anamorphic universe},
author = {Graef, L.L. and Ferreira, Elisa G.M. and Brandenberger, Robert and Hipólito-Ricaldi, W.S., E-mail: leilagraef@on.br, E-mail: wiliam.ricaldi@ufes.br, E-mail: elisa.ferreira@mail.mcgill.ca, E-mail: rhb@physics.mcgill.ca},
abstractNote = {We discuss scalar-tensor realizations of the Anamorphic cosmological scenario recently proposed by Ijjas and Steinhardt [1]. Through an analysis of the dynamics of cosmological perturbations we obtain constraints on the parameters of the model. We also study gravitational Parker particle production in the contracting Anamorphic phase and we compute the fraction between the energy density of created particles at the end of the phase and the background energy density. We find that, as in the case of inflation, a new mechanism is required to reheat the universe.},
doi = {10.1088/1475-7516/2017/04/004},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 04,
volume = 2017,
place = {United States},
year = {Sat Apr 01 00:00:00 EDT 2017},
month = {Sat Apr 01 00:00:00 EDT 2017}
}