Irreversible Matter Creation in Inflationary Cosmology
Source: Astrophysics and Space Science, Volume 253, Number 1, 1997 , pp. 161-175(15)
Abstract:Irreversible matter creation is investigated in a two-component (scalar field and ordinary matter) cosmological fluid in a homogeneous spatially flat and isotropic Friedmann-Robertson-Walker (FRW) inflationary Universe during its reheating era. The thermodynamics of open systems as applied together with the gravitational field equations to the two-component cosmological fluid leads to a generalisation of the elementary reheating theory in which the decay (creation) pressures are explicitly considered as parts of the fluid stress-energy tensor. Particular models describing coherently oscillating scalar waves and leading to a high particle production at the beginning of the oscillatory period are considered too.
Document Type: Regular Paper
Publication date: January 1, 1997