Kinetic vs. thermal-field-theory approach to cosmological perturbations.

Details Kinetic vs. thermal-field-theory approach to cosmological perturbations. Kinetic vs. thermal-field-theory approach to cosmological perturbations.

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994kvta.book.....r&link_type=abstract

Kinetic vs. thermal-field-theory approach to cosmological perturbations., by Rebhan, A. K.; Schwarz, D. J.. Deutsches Elektrone

Mathematics

Logic

Scientific paper

A closed set of equations for the evolution of linear perturbations of homogeneous, isotropic cosmological models can be obtained in various ways. The simplest approach is to assume a macroscopic equation of state, e.g. that of a perfect fluid. For a more refined description of the early universe, a microscopic treatment is required. The purpose of this paper is to compare the approach based on classical kinetic theory to the more recent thermal-field-theory approach. It is shown that in the high-temperature limit the latter describes cosmological perturbations supported by collisionless, massless matter, wherein it is equivalent to the kinetic theory approach. The dependence of the perturbations in a system of a collisionless gas and a perfect fluid on the initial data is discussed in some detail. All singular and regular solutions are found analytically.

Affiliated with

Also associated with

No associations

Rating

Kinetic vs. thermal-field-theory approach to cosmological perturbations. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Kinetic vs. thermal-field-theory approach to cosmological perturbations., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kinetic vs. thermal-field-theory approach to cosmological perturbations. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1872080