Eur. Phys. J. Plus (2014) 129: 253
https://doi.org/10.1140/epjp/i2014-14253-5

Regular Article

Flat universe with decaying cosmological constant

Department of Mathematics, Govt. Model Science College, 486001, Rewa, M.P, India

^* e-mail: rishitiwari59@rediffmail.com

Received: 21 September 2014
Revised: 21 September 2014
Accepted: 20 October 2014
Published online: 25 November 2014

Abstract

We have investigated the Robertson-Walker cosmological model with decaying vacuum density. We considered a special variation law in which the vacuum density Λ is proportional to the n-th power of the Hubble parameter H, i.e., Λ ∝ H ⁿ (where n is a constant) (Phys. Rev. D 58, 043506 (1998)). Physical, kinematical and statefinder parameters are evaluated and their behaviors are discussed. It can be seen that the values of statefinders resemble the ΛCDM model and, so, the model is in agreement with recent observations.