Fluctuations from dissipation in a hot non-Abelian plasma

Details Fluctuations from dissipation in a hot non-Abelian plasma Fluctuations from dissipation in a hot non-Abelian plasma

1999-10-14

arxiv.org/abs/hep-ph/9910348v4

Phys.Rev. D61 (2000) 125004

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, revtex, no figures, identical to published version

Scientific paper

10.1103/PhysRevD.61.125004

We consider a transport equation of the Boltzmann-Langevin type for non-Abelian plasmas close to equilibrium to derive the spectral functions of the underlying microscopic fluctuations from the entropy. The correlator of the stochastic source is obtained from the dissipative processes in the plasma. This approach, based on classical transport theory, exploits the well-known link between a linearized collision integral, the entropy and the spectral functions. Applied to the ultra-soft modes of a hot non-Abelian (classical or quantum) plasma, the resulting spectral functions agree with earlier findings obtained from the microscopic theory. As a by-product, it follows that B\"odeker's effective theory is consistent with the fluctuation-dissipation theorem.

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