Wavefront velocities in a cosmic fluid with bulk viscosity and matter creation

Details Wavefront velocities in a cosmic fluid with bulk viscosity and matter creation Wavefront velocities in a cosmic fluid with bulk viscosity and matter creation

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996cqgra..13.2977g&link_type=abstract

Classical and Quantum Gravity, Volume 13, Issue 11, pp. 2977-2985 (1996).

Mathematics

Logic

9

Scientific paper

Wavefront velocities are calculated for a dissipative simple fluid. The dissipative effects considered are scalar: bulk viscous stress and matter creation. Relativistic extended irreversible thermodynamics are used and cross-effects are considered. These results are applied to exponential inflation in the spatially flat Friedmann - Lemaître - Robertson - Walker cosmological model, and give infinite wave speeds. We thus conclude that exponential inflation cannot be driven by bulk viscosity.

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