Nonsingular models of universes in teleparallel theories
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10.1103/PhysRevLett.110.071104
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/18733
Tipus de documentArticle
Data publicació2013-02-14
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Abstract
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
Descripció
PACS Numbers: 04.50.Kd, 98.80.Jk
CitacióHaro, J.; Amoros, J. Nonsingular models of universes in teleparallel theories. "Physical review letters", 14 Febrer 2013, vol. 110, núm. 7, p. 1-5.
ISSN0031-9007
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