Fresh inflation and decoherence of super Hubble fluctuations

Details Fresh inflation and decoherence of super Hubble fluctuations Fresh inflation and decoherence of super Hubble fluctuations

2001-06-26

arxiv.org/abs/gr-qc/0106086v4

Phys.Rev. D64 (2001) 123508

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

version with minor changes. To appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.64.123508

I study a stochastic approach to the recently introduced fresh inflation model for super Hubble scales. I find that the state loses its coherence at the end of the fresh inflationary period as a consequence of the damping of the interference function in the reduced density matrix. This fact should be a consequence of a) the relative evolutions of both the scale factor and the horizon and b) the additional thermal and dissipative effects. This implies a relevant difference with respect to supercooled inflationary scenarios which require a very rapid expansion of the scale factor to give the decoherence of super Hubble fluctuations.

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