Title:
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Nonsingular models of universes in teleparallel theories
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Author:
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Haro Cases, Jaume; Amorós Torrent, Jaume
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Matemàtica Aplicada I; Universitat Politècnica de Catalunya. EGSA - Equacions Diferencials, Geometria, Sistemes Dinàmics i de Control, i Aplicacions |
Abstract:
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PACS Numbers: 04.50.Kd, 98.80.Jk |
Abstract:
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Different models of universes are considered in the context of teleparallel theories. Assuming that the
universe is filled by a fluid with an equation of state
P
¼
f
ð
Þ
, for different teleparallel theories and
different equation of state we study its dynamics. Two particular cases are studied in detail: in the first one
we consider a function
f
with two zeros (two de Sitter solutions) that mimics a huge cosmological
constant at early times and a pressureless fluid at late times; in the second one, in the context of loop
quantum cosmology with a small cosmological constant, we consider a pressureless fluid (
P
¼
0
,
f
ð
Þ¼
) which means there are de Sitter and anti–de Sitter solutions. In both cases one obtains a
nonsingular universe that at early times is in an inflationary phase; after leaving this phase, it passes trough
a matter dominated phase and finally at late times it expands in an accelerated way |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Matemàtiques i estadística -Cosmology -Cosmological constants -Equation of state -Loop quantum cosmologies -Nonsingular -Pressureless -Teleparallel theory -Cosmologia |
Rights:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Published version Article |
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