Eur. Phys. J. Plus (2014) 129: 31
https://doi.org/10.1140/epjp/i2014-14031-5

Regular Article

Interacting Ricci dark energy in scalar Gauss-Bonnet gravity

¹ Pailan College of Management and Technology, Bengal Pailan Park, 700 104, Kolkata, India
² Department of Physics, University of Trieste, Trieste, Italy
³ Department of physics, Damnhour University, Damnhour, Egypt

^* e-mail: surajcha@iucaa.ernet.in

Received: 2 October 2013
Accepted: 21 January 2014
Published online: 19 February 2014

Abstract

This paper reports a study on the cosmological application of interacting Ricci Dark Energy (RDE) density in the scalar Gauss-Bonnet framework. The interacting holographic RDE model has been employed to obtain the equation of state (EoS) in a spatially flat universe. The main results of this paper are that the reconstructed potential of scalar Gauss-Bonnet gravity for the interacting RDE model decays with the evolution of the universe. However, it is an increasing function of the scalar field . Both the strong and weak energy conditions are violated. A phantom-like behavior of the EoS parameter has been obtained. The effective EoS parameter stays below -1 but tends to -1 with the evolution of the universe. However, it cannot cross the phantom boundary. Finally, the interacting RDE model in Gauss-Bonnet gravity gives accelerated expansion of the universe.