Anisotropic cosmology and (super)stiff matter in Hořava’s gravity theory

Abstract

We study anisotropic cosmology in Ho\ifmmode \check{r}\else \v{r}\fi{}ava's gravity theory and obtain Kasner-type solutions, valid for any number, $d$, of spatial dimensions. The corresponding exponents satisfy two relations, one involving the marginal coupling $\ensuremath{\lambda}$. Also, Ho\ifmmode \check{r}\else \v{r}\fi{}ava's (super)renormalizable theory predicts (super)stiff matter whose equation of state is $p=w\ensuremath{\rho}$, with $w\ensuremath{\ge}1$. We discuss briefly the implications of these results for the nature of cosmological collapse.

Identifiers

DOI

10.1103/physrevd.79.124031

Citations and references