Phenomenological aspects of Hořava–Lifshitz cosmology

By S. Mukohyama, K. Nakayama, F. Takahashi, Shuichiro Yokoyama. 2009

134 citations recorded by the source corpus.

Abstract We show that, assuming the dispersion relation proposed recently by Hořava in the context of quantum gravity, radiation energy density exhibits a peculiar dependence on the scale factor; the radiation energy density decreases proportional to a −6 . This simple scaling can have an impact on cosmology. As an example, we show that the resultant baryon asymmetry as well as the stochastic gravity waves can be enhanced. We also discuss current observational constraint on the dispersion relation.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/9f69e057946d98bd2ebb62c477f685d047c1c2b9

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Citations in the corpus

The black hole and cosmological solutions in IR modified Hořava gravity (2009, background): “Since then various aspects and solutions have been studied [3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29].”
Modified Gravity and Cosmology (2011, background): “This is often at the root of much of the interesting cosmology that has subsequently arisen, including (i) a scale invariant spectrum of cosmological perturbations, without early time acceleration [925, 284], (ii) cosmological bounces [179, 234, 522, 854, 351], (iii) dark matter as an integration co”
Dark matter as integration constant in Horava-Lifshitz gravity (2009, unknown): “For example, the z = 3 Lifshitz scaling not only is the origin of the power-counting renormalizability but also leads to a number of interesting cosmological consequences, such as generation of scale-invariant cosmological perturbations from a non-inflationary epoch of the early universe [7] and a p”