KINETIC VERSUS THERMAL-FIELD-THEORY APPROACH TO COSMOLOGICAL PERTURBATIONS

REBHAN AK, Schwarz D (1994)
PHYSICAL REVIEW D 50(4): 2541-2559.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
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.
Erscheinungsjahr
1994
Zeitschriftentitel
PHYSICAL REVIEW D
Band
50
Ausgabe
4
Seite(n)
2541-2559
ISSN
0556-2821
Page URI
https://pub.uni-bielefeld.de/record/2323352

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REBHAN AK, Schwarz D. KINETIC VERSUS THERMAL-FIELD-THEORY APPROACH TO COSMOLOGICAL PERTURBATIONS. PHYSICAL REVIEW D. 1994;50(4):2541-2559.
REBHAN, A. K., & Schwarz, D. (1994). KINETIC VERSUS THERMAL-FIELD-THEORY APPROACH TO COSMOLOGICAL PERTURBATIONS. PHYSICAL REVIEW D, 50(4), 2541-2559. doi:10.1103/PhysRevD.50.2541
REBHAN, A. K., and Schwarz, D. (1994). KINETIC VERSUS THERMAL-FIELD-THEORY APPROACH TO COSMOLOGICAL PERTURBATIONS. PHYSICAL REVIEW D 50, 2541-2559.
REBHAN, A.K., & Schwarz, D., 1994. KINETIC VERSUS THERMAL-FIELD-THEORY APPROACH TO COSMOLOGICAL PERTURBATIONS. PHYSICAL REVIEW D, 50(4), p 2541-2559.
A.K. REBHAN and D. Schwarz, “KINETIC VERSUS THERMAL-FIELD-THEORY APPROACH TO COSMOLOGICAL PERTURBATIONS”, PHYSICAL REVIEW D, vol. 50, 1994, pp. 2541-2559.
REBHAN, A.K., Schwarz, D.: KINETIC VERSUS THERMAL-FIELD-THEORY APPROACH TO COSMOLOGICAL PERTURBATIONS. PHYSICAL REVIEW D. 50, 2541-2559 (1994).
REBHAN, AK, and Schwarz, Dominik. “KINETIC VERSUS THERMAL-FIELD-THEORY APPROACH TO COSMOLOGICAL PERTURBATIONS”. PHYSICAL REVIEW D 50.4 (1994): 2541-2559.

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