Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1996-02-13
Class.Quant.Grav. 13 (1996) 403-416
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
19 pages, Latex file, to appear in Class.Quantum Grav
Scientific paper
10.1088/0264-9381/13/3/008
Recently, the phenomenological description of cosmological particle production processes in terms of effective viscous pressures has attracted some attention. Using a simple creation rate model we discuss the question to what extent this approach is compatible with the kinetic theory of a relativistic gas. We find the effective viscous pressure approach to be consistent with this model for homogeneous spacetimes but not for inhomogeneous ones.
Pavon Diego
Triginer Josep
Zimdahl Winfried
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