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Cosmological solutions in spatially curved universes with adiabatic particle production. (English) Zbl 1368.83025

Summary: We perform a qualitative and thermodynamic study of two models when one takes into account adiabatic particle production. In the first one, there is a constant particle production rate, which leads to solutions depicting the current cosmic acceleration but without inflation. The other one has solutions that unify the early and late time acceleration. These solutions converge asymptotically to the thermal equilibrium.

MSC:

83C15 Exact solutions to problems in general relativity and gravitational theory
83F05 Relativistic cosmology
83C47 Methods of quantum field theory in general relativity and gravitational theory
83C75 Space-time singularities, cosmic censorship, etc.
81T20 Quantum field theory on curved space or space-time backgrounds
85A40 Astrophysical cosmology
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