DECOHERENCE FUNCTIONAL AND INHOMOGENEITIES IN THE EARLY UNIVERSE

1 June 1993

journal article
Published by World Scientific Pub Co Pte Ltd in International Journal of Modern Physics D

Vol. 2 (2) , 171-181
https://doi.org/10.1142/s0218271893000155

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

DENSITY MATRIX
INFLATION
PERTURBATION THEORY
QUANTUM COSMOLOGY

All Related Versions

Version 1, 1993-03-30, ArXiv

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