The Hartree ensemble approximation revisited: The "symmetric phase"

Details The Hartree ensemble approximation revisited: The "symmetric phase" The Hartree ensemble approximation revisited: The "symmetric phase"

2002-08-14

arxiv.org/abs/hep-ph/0208139v2

Phys.Rev. D67 (2003) 116006

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages RevTeX, 16 figures, 3 tables, uses amsmath and feynmp. Extended some sections, reordered Sec.IV, added 3 refs, numeri

Scientific paper

10.1103/PhysRevD.67.116006

The Hartree ensemble approximation is studied in the ``symmetric phase'' of 1+1 dimensional lambda phi^4 theory. In comparison with the ``broken phase'' studied previously, it is shown that the dynamical evolution of observables such as the particle distribution, energy exchange and auto-correlation functions, is substantially slower. Approximate thermalization is found only for relatively large energy densities and couplings.

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