Cyclic and Ekpyrotic Universes in Modified Finsler Osculating Gravity on Tangent Lorentz Bundles

Дата и время публикации : 2012-06-14T20:01:35Z

Авторы публикации и институты :
Panayiotis C. Stavrinos
Sergiu I. Vacaru

Ссылка на журнал-издание: Class. Quant. Grav. 30 (2013) 055012
Коментарии к cтатье: latex2e, 28 pages, version accepted by CQG, with modifications and additional explanations and new references requested by referees
Первичная категория: astro-ph.CO

Все категории : astro-ph.CO, gr-qc, math-ph, math.MP

Краткий обзор статьи: We consider models of accelerating Universe elaborated for Finsler like gravity theories constructed on tangent bundles to Lorentz manifolds. In the osculating approximation, certain locally anisotropic configurations are similar to those for f(R) gravity. This allows us to generalize a proposal (by Nojiri, Odintsov and Saez-Gomez, arXiv: 1108.0767) in order to reconstruct and compare two classes of Einstein-Finsler gravity, EFG, and f(R) gravity theories using modern cosmological data and realistic physical scenarios. We conclude that EFG provides inflation, acceleration and little rip evolution scenarios with realistic alternatives to standard Lambda CDM cosmology. The approach is based on a proof that there is a general decoupling property of gravitational field equations in EFG and modified theories which allows us to generate off-diagonal cosmological solutions.

Category: Physics