4.6 Article

Phase-space analysis of Horava-Lifshitz cosmology

出版社

IOP Publishing Ltd
DOI: 10.1088/1475-7516/2009/11/006

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cosmology of theories beyond the SM; quantum gravity phenomenology

资金

  1. Programa Nacional de Ciencias Basicas (PNCB)

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We perform a detailed phase-space analysis of Horava-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 Ho. rava-Lifshitz cosmology can be compatible with observations, it does not enlighten the discussion about its possible conceptual and theoretical problems.

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