Stochastic Dynamics of Coarse-Grained Quantum Fields in Inflationary Universe

Details Stochastic Dynamics of Coarse-Grained Quantum Fields in Inflationary Universe Stochastic Dynamics of Coarse-Grained Quantum Fields in Inflationary Universe

1994-01-26

arxiv.org/abs/gr-qc/9401030v1

Phys.Rev. D49 (1994) 6434-6441

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

23 pages, Very Plain TeX

Scientific paper

10.1103/PhysRevD.49.6434

It is shown how coarse-graining of quantum field ^M theory in de Sitter space
leads to the emergence of a classical ^M stochastic description as an effective
theory in the infra-red regime. ^M The quantum state of the coarse-grained
scalar field is found to be a highly^M squeezed coherent state, whose center
performs a random walk on a^M bundle of classical trajectories.^M

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