Relic gravitational wave spectrum, the trans-Planckian physics and Hořava-Lifshitz gravity

Details Relic gravitational wave spectrum, the trans-Planckian physics and Hořava-Lifshitz gravity Relic gravitational wave spectrum, the trans-Planckian physics and Hořava-Lifshitz gravity

2009-07-05

arxiv.org/abs/0907.0850v2

Class.Quant.Grav.27:225015,2010

Physics

High Energy Physics

High Energy Physics - Theory

16 pages, 2 figures; added references and comments

Scientific paper

10.1088/0264-9381/27/22/225015

We calculate the spectrum of the relic gravitational wave due to the trans-Planckian effect in which the standard linear dispersion relations may be modified. Of the modified dispersion relations suggested in literatures which have investigated the trans-Planckian effect, we especially use the Corley-Jacobson dispersion relations. The Corley-Jacobson type modified dispersion relations can be obtained from Ho\v{r}ava-Lifshitz gravity which is non-relativistic and UV complete. Although it is not clear how the transitions from Ho\v{r}ava-Lifshitz gravity in the UV regime to Einstein gravity in the IR limit occur, we assume Ho\v{r}ava-Lifshitz gravity regime is followed by the inflationary phase in Einstein gravity.

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