Physics – Condensed Matter
Scientific paper
1995-12-05
Phys.Lett. B405 (1997) 121-125
Physics
Condensed Matter
Latex, 7 pages, 2 postscript figures, submitted to PRL. Also available at http://fnas08.fnal.gov/
Scientific paper
10.1016/S0370-2693(97)00621-7
We consider the nonequilibrium dynamics of a a real scalar field in a degenerate double-well potential. The system is prepared in the lowest free energy state in one of the wells and the dynamics is driven by the coupling of the field to a thermal bath. Using a simple analytical model, based on the subcritical bubbles method, we compute the fraction of the total volume which fluctuates to the opposite phase as a function of the parameters of the potential. Furthermore, we show how complete phase mixing, {\em i.e.} symmetry restoration, is related to percolation, which is dynamically driven by domain instability. Our method describes quantitatively recent results obtained by numerical simulations, and is applicable to systems in the Ising universality class.
Gleiser Marcelo
Heckler Andrew F.
Kolb Edward W.
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