Phase-space analysis of Hořava-Lifshitz cosmology

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Published 5 November 2009 Published under licence by IOP Publishing Ltd
, , Citation Genly Leon and Emmanuel N. Saridakis JCAP11(2009)006 DOI 10.1088/1475-7516/2009/11/006

1475-7516/2009/11/006

Abstract

We perform a detailed phase-space analysis of Hořava-Lifshitz cosmology, with and without the detailed-balance condition. Under detailed-balance we find that the universe can reach a bouncing-oscillatory state at late times, in which dark-energy, behaving as a simple cosmological constant, is dominant. In the case where the detailed-balance condition is relaxed, we find that the universe reaches an eternally expanding, dark-energy-dominated solution, with the oscillatory state preserving also a small probability. Although this analysis indicates that Hořava-Lifshitz cosmology can be compatible with observations, it does not enlighten the discussion about its possible conceptual and theoretical problems.

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10.1088/1475-7516/2009/11/006