Eur. Phys. J. C (2011) 71: 1684
https://doi.org/10.1140/epjc/s10052-011-1684-4

Regular Article - Theoretical Physics

Early and late-time cosmic acceleration in non-minimal Yang–Mills-f(G) gravity

¹ Department of Basic Sciences, Babol University of Technology, Babol, Iran
² Department of Physics, Ayatollah Amoli Branch, Islamic Azad University, P.O. Box 678, Amol, Iran

^* e-mail: a.banijamali@nit.ac.ir

Received: 9 April 2011
Revised: 19 May 2011
Published online: 30 June 2011

Abstract

In this paper we show that power-law inflation can be realized in non-minimal gravitational coupling of Yang–Mills field with a general function of the Gauss–Bonnet invariant in the framework of Einstein gravity. Such a non-minimal coupling may appear due to quantum corrections. We also discuss the non-minimal Yang–Mills-f(G) gravity in the framework of modified Gauss–Bonnet action which is widely studied recently. It is shown that both inflation and late-time cosmic acceleration are possible in such a theory.