Decoherence Functional and Inhomogeneities in the Early Universe

Preprint

30 March 1993

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.gr-qc/9303036

Abstract

We investigate the quantum to classical transition of small inhomogeneous fluctuations in the early Universe using the decoherence functional of Gell-Mann and Hartle. We study two types of coarse graining; one due to coarse graining the value of the scalar field and the other due to summing over an environment. We compare the results with a previous study using an environment and the off-diagonal rule proposed by Zurek. We show that the two methods give different results.

Keywords

DECOHERENCE FUNCTIONAL
CLASSICAL TRANSITION
SMALL INHOMOGENEOUS
COARSE GRAINING
EARLY UNIVERSE
DIAGONAL RULE
GELL MANN
GRAINING
ZUREK

All Related Versions

Version 1, 1993-03-30, ArXiv
Published version: International Journal of Modern Physics D, 2 (2), 171.

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