Eur. Phys. J. C (2012) 72: 2067
https://doi.org/10.1140/epjc/s10052-012-2067-1

Regular Article - Theoretical Physics

Solvable k-essence cosmologies and modified Chaplygin gas unified models of dark energy and dark matter

¹ Department of Mathematics, University of the Punjab, Quaid-e-Azam Campus, Lahore, 54590, Pakistan
² Eurasian International Center for Theoretical Physics, Eurasian National University, Astana, 010008, Kazakhstan

^* e-mail: msharif.math@pu.edu.pk

Received: 4 May 2012
Published online: 18 July 2012

Abstract

This paper is devoted to the investigation of the modified Chaplygin gas model in the context of solvable k-essence cosmologies. For this purpose, we construct equations of state parameter of this model for some particular values of the parameter n. The graphical behavior of these equations are also discussed by using power law form of scalar field. The relationship between k-essence and the modified Chaplygin gas model shows viable results in the dark energy scenario. We conclude that the universe behaves as a cosmological constant, quintessence phase or phantom phase depending upon n.