Can universe exit from phantom inflation due to gravitational back reaction?

Details Can universe exit from phantom inflation due to gravitational back reaction? Can universe exit from phantom inflation due to gravitational back reaction?

2006-04-27

arxiv.org/abs/gr-qc/0604117v1

JCAP 0605 (2006) 008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

9 pages, Revtex4, to appear in JCAP

Scientific paper

10.1088/1475-7516/2006/05/008

The effects of the gravitational back reaction of cosmological perturbations are investigated in a phantom inflation model. The effective energy-momentum tensor of the gravitational back reaction of cosmological perturbations whose wavelengths are larger than the Hubble radius is calculated. Our results show that the effects of gravitational back reaction will counteract that of the phantom energy. It is demonstrated in a chaotic phantom inflation model that if the phantom field at the end of inflation is larger than a critical value determined by the necessary e-folds, the phantom inflation phase might be terminated by the gravitational back reaction.

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