Decoherence during Inflation: the generation of classical inhomogeneities

Details Decoherence during Inflation: the generation of classical inhomogeneities Decoherence during Inflation: the generation of classical inhomogeneities

2005-06-08

arxiv.org/abs/gr-qc/0506051v3

Phys.Rev. D72 (2005) 063506

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

17 pages, 15 figures. To appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.72.063506

We show how the quantum to classical transition of the cosmological fluctuations produced during inflation can be described by means of the influence functional and the master equation. We split the inflaton field into the system-field (long-wavelength modes), and the environment, represented by its own short-wavelength modes. We compute the decoherence times for the system-field modes and compare them with the other time scales of the model. We present the renormalized stochastic Langevin equation for an homogeneous system-field and then we analyze the influence of the environment on the power spectrum for some modes in the system.

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