Kinetic theory for nongeodesic particle motion: Selfinteracting equilibrium states and effective viscous fluid pressures

Details Kinetic theory for nongeodesic particle motion: Selfinteracting equilibrium states and effective viscous fluid pressures Kinetic theory for nongeodesic particle motion: Selfinteracting equilibrium states and effective viscous fluid pressures

1998-07-29

arxiv.org/abs/gr-qc/9807078v1

Class.Quant.Grav. 15 (1998) 3259-3270

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

16 pages, latex, uses ioplppt.sty. To appear in Class. Quantum Grav

Scientific paper

10.1088/0264-9381/15/10/026

The particles of a classical relativistic gas are supposed to move under the influence of a quasilinear (in the particle four-momenta), self-interacting force inbetween elastic, binary collisions. This force which is completely fixed by the equilibrium conditions of the gas, gives rise to an effective viscous pressure on the fluid phenomenological level. Earlier results concerning the possibility of accelerated expansion of the universe due to cosmological particle production are reinterpreted. A phenomenon such as power law inflation may be traced back to specific self-interacting forces keeping the particles of a gas universe in states of generalized equilibrium.

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