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Title: Effects of temperature on the creation of particles in a hot Friedmann universe

Abstract

The creation of particles (bosons and fermions) in a hot Friedmann universe from an initial state described by a thermal density matrix is considered in the case when the effective mass of the particles depends on the temperature. It is shown that for scalar particles allowance for the temperature effects leads to a very strong suppression of the creation process. For spinor particles, allowance for the temperature effects leads to a strong suppression of the process of creation from an initial vacuum state. However if the creation of the spinor particles takes place from a state described by a thermal density matrix, then the temperature effect on the particle creation process is relatively weak.

Authors:
;
Publication Date:
Research Org.:
Odessa State Univ. (USSR)
OSTI Identifier:
5275171
Resource Type:
Journal Article
Journal Name:
Astrophysics (Engl. Transl.); (United States)
Additional Journal Information:
Journal Volume: 26:2; Other Information: Translated from Astrofizika; 26: No.2, 377-385(Mar-Apr 1987)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BOSONS; PARTICLE PRODUCTION; FERMIONS; UNIVERSE; COSMOLOGICAL MODELS; ORIGIN; TEMPERATURE EFFECTS; COUPLING CONSTANTS; DENSITY MATRIX; INHIBITION; QUANTUM FIELD THEORY; SCALAR FIELDS; SPINOR FIELDS; TEMPERATURE DEPENDENCE; VACUUM STATES; WAVE FUNCTIONS; FIELD THEORIES; FUNCTIONS; MATHEMATICAL MODELS; MATRICES; 640106* - Astrophysics & Cosmology- Cosmology; 645400 - High Energy Physics- Field Theory

Citation Formats

Guenther, U, and Zhuk, A I. Effects of temperature on the creation of particles in a hot Friedmann universe. United States: N. p., 1987. Web.
Guenther, U, & Zhuk, A I. Effects of temperature on the creation of particles in a hot Friedmann universe. United States.
Guenther, U, and Zhuk, A I. Tue . "Effects of temperature on the creation of particles in a hot Friedmann universe". United States.
@article{osti_5275171,
title = {Effects of temperature on the creation of particles in a hot Friedmann universe},
author = {Guenther, U and Zhuk, A I},
abstractNote = {The creation of particles (bosons and fermions) in a hot Friedmann universe from an initial state described by a thermal density matrix is considered in the case when the effective mass of the particles depends on the temperature. It is shown that for scalar particles allowance for the temperature effects leads to a very strong suppression of the creation process. For spinor particles, allowance for the temperature effects leads to a strong suppression of the process of creation from an initial vacuum state. However if the creation of the spinor particles takes place from a state described by a thermal density matrix, then the temperature effect on the particle creation process is relatively weak.},
doi = {},
url = {https://www.osti.gov/biblio/5275171}, journal = {Astrophysics (Engl. Transl.); (United States)},
number = ,
volume = 26:2,
place = {United States},
year = {1987},
month = {9}
}