Vm. Zhuravlev, Two-component cosmological models with a variable equation of state of matter and with thermal equilibrium of components, J EXP TH PH, 93(5), 2001, pp. 903-919
A class of models describing the evolution of the homogeneous and isotropic
spatially flat Universe filled with a scalar field and matter and changing
the equation of state during its evolution from a vacuum-like form to an i
deal liquid is proposed under the assumption that both components of matter
are in thermal equilibrium. The main characteristics of such models are an
alyzed and their asymptotic behavior in the vicinity of a cosmological sing
ularity and at the postinflation stage is investigated. It is shown that th
e thermal equilibrium condition and the requirement of asymptotic decrease
of the field with time unambiguously lead to secondary inflation at the fin
al stage of evolution, which is accompanied by accelerated expansion of the
Universe and an increase in the temperature of matter. (C) 2001 MAIK "Nauk
a/Interperiodica".