Preventing eternality in phantom inflation

Details Preventing eternality in phantom inflation Preventing eternality in phantom inflation

2010-04-12

arxiv.org/abs/1004.1874v3

Physical Review D 82, 023526 (2010)

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

8 pages, V2 references added. V3 version published in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.82.023526

We have investigated the necessary conditions that prevent phantom inflation from being eternal. Allowing additionally for a nonminimal coupling between the phantom field and gravity, we present the slow-climb requirements, perform an analysis of the fluctuations, and finally we extract the overall conditions that are necessary in order to prevent eternality. Furthermore, we verify our results by solving explicitly the cosmological equations in a simple example of an exponential potential, formulating the classical motion plus the stochastic effect of the fluctuations through Langevin equations. Our analysis shows that phantom inflation can be finite without the need of additional exotic mechanisms.

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