Eur. Phys. J. C (2013) 73: 2315
https://doi.org/10.1140/epjc/s10052-013-2315-z

Regular Article - Theoretical Physics

Einstein static universe in exponential f(T) gravity

¹ Department of Physics, National Tsing Hua University, Hsinchu, 300, Taiwan
² Physics Division, National Center for Theoretical Sciences, Hsinchu, 300, Taiwan

^* e-mail: geng@phys.nthu.edu.tw

Received: 3 July 2012
Revised: 7 January 2013
Published online: 22 February 2013

Abstract

We analyze the stability of the Einstein static closed and open universe in two types of exponential f(T) gravity theory. We show that stable solutions exist in these two models. In particular, we find that large regions of parameter space in equation of state w=p/ρ for the stable universe are allowed in the f(T) theories.