Stochastic Dynamics of Coarse-Grained Quantum Fields in Inflationary Universe

Abstract

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

23 pages, Very Plain TeX

References in corpus (1)

• Cosmological Rotation of Quantum-Mechanical Origin and Anisotropy of the Microwave Background

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