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DY: Dynamik und Statistische Physik

DY 10: Statistical physics far from thermal equilibrium

DY 10.2: Vortrag

Montag, 24. März 2003, 10:00–10:15, G\"OR/226

Novel phase-separation transition in one-dimensional driven models — •Richard D. Willmann^1,2, Yariv Kafri¹, Erel Levine¹, David Mukamel¹, and Gunter M. Schütz² — ¹Weizmann Institute of Science, Israel — ²Forschungszentrum Jülich, Germany

A class of models of driven diffusive systems which is shown to exhibit phase separation in d=1 dimensions is introduced. Unlike all previously studied models exhibiting similar phenomena, here the phase separated state is fluctuating in the bulk of the macroscopic domains. It exists only at high enough densities, while at low densities the system is homogeneous. This phase was termed ’condensed’ as the mechanism of the transition is similar to that of the Bose-Einstein condensation. The nature of the phase transition from the homogeneous to the phase separated state is discussed in view of a recently introduced criterion for phase separation in one-dimensional driven systems (see PRL 89, 035702 (2002)). For further details see cond-mat/0211269.