A bouncing universe is a viable candidate to solve the initial singularity problem. Here we consider bouncing solutions in the context of f(R,G) gravity by using an order reduction technique which allows one to find solutions that are perturbatively close to General Relativity. This procedure also acts as a model selection approach. Indeed, several covariant gravitational actions leading to a bounce are directly selected by demanding that the Friedmann equation derived within such gravity theories coincides with the one emerging from Loop Quantum Cosmology.
Bouncing cosmology in f(R,G) gravity by order reduction / Barros, B. J.; Teixeira, E. M.; Vernieri, D.. - In: ANNALS OF PHYSICS. - ISSN 0003-4916. - 419:(2020), p. 168231. [10.1016/j.aop.2020.168231]
Bouncing cosmology in f(R,G) gravity by order reduction
Vernieri D.
2020
Abstract
A bouncing universe is a viable candidate to solve the initial singularity problem. Here we consider bouncing solutions in the context of f(R,G) gravity by using an order reduction technique which allows one to find solutions that are perturbatively close to General Relativity. This procedure also acts as a model selection approach. Indeed, several covariant gravitational actions leading to a bounce are directly selected by demanding that the Friedmann equation derived within such gravity theories coincides with the one emerging from Loop Quantum Cosmology.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
