Emergent universe in theories with natural UV cutoffs
Abstract
We investigate the realization of the emergent universe scenario in theories with natural UV cutoffs, namely a minimum length and a maximum momentum, quantified by a new deformation parameter in the generalized uncertainty principle. We extract the Einstein static universe solutions and we examine their stability through a phase-space analysis. As we show, the role of the new deformation parameter is crucial in a twofold way: Firstly, it leads to the appearance of new Einstein static universe critical points, that are absent in standard cosmology. Secondly, it provides a way for a graceful exit from the Einstein static universe into the expanding thermal history, that is needed for a complete and successful realization of the emergent universe scenario.
Keywords
Cite
@article{arxiv.1612.09254,
title = {Emergent universe in theories with natural UV cutoffs},
author = {Mohsen Khodadi and Kourosh Nozari and Emmanuel N. Saridakis},
journal= {arXiv preprint arXiv:1612.09254},
year = {2017}
}
Comments
9 pages, 5 figures, version published in Class.Quant.Grav