Dynamics of gravitating hadron matter in Bianchi-IX cosmological model
Abstract
We perform an analysis of the Einstein-Skyrme cosmological model in Bianchi-IX background. We analytically describe asymptotic regimes and semi-analytically -- generic regimes. It appears that depending on the product of Newtonian constant with Skyrme coupling , in absence of the cosmological term there are three regimes possible -- recollapse with and two power-law regimes -- for and for . In presence of the positive cosmological term, power-law regimes turn to exponential (de Sitter) ones while recollapse regime turn to exponential if the value for -term is sufficiently large, otherwise the regime remains recollapse. Negative cosmological term leads to the recollapse regardless of . All nonsingular regimes have the squashing coefficient at late times, which is associated with restoring symmetry dynamics. Also all nonsingular regimes appear to be linearly stable -- exponential solutions always while power-law for an open region of initial conditions.
Keywords
Cite
@article{arxiv.1607.00536,
title = {Dynamics of gravitating hadron matter in Bianchi-IX cosmological model},
author = {Sergey A. Pavluchenko},
journal= {arXiv preprint arXiv:1607.00536},
year = {2016}
}
Comments
14 pages, 4 figures, Phys Rev D accepted version