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

Journal Article · Tue Sep 01 00:00:00 EDT 1987 · Astrophysics (Engl. Transl.); (United States)

OSTI ID:5275171

Guenther, U; Zhuk, A I

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.

• Research Organization: Odessa State Univ. (USSR)
• OSTI ID: 5275171
• Journal Information: Astrophysics (Engl. Transl.); (United States), Vol. 26:2; Other Information: Translated from Astrofizika; 26: No.2, 377-385(Mar-Apr 1987)
• Country of Publication: United States
• Language: English

Related Subjects

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