Nonsingular models of universes in teleparallel theories
Tipus de documentArticle
Condicions d'accésAccés obert
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
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.