Phase transitions induced by thermal fluctuations

D. O. Kharchenko () and A. V. Dvornichenko

The European Physical Journal B: Condensed Matter and Complex Systems, 2008, vol. 61, issue 1, 95-103

Abstract: The present study generalizes the model of extended stochastic systems with a field-dependent kinetic coefficient [M. Ibanes, J. Garcia-Ojalvo, R. Toral, J.M. Sancho, Phys. Rev. Lett. 87, 020601 (2001)] to systems with symmetric and asymmetric bistable potentials. It is found that in systems with a relaxational flow and a symmetric local potential, reentrant phase transitions can be observed. In the case of an asymmetric local potential, a hysteresis-like behaviour in the order parameter appears. It is shown that such phase transitions can be controlled by the constant that governs relaxation flow, noise intensity and spatial coupling intensity. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008

Keywords: 05.40.-a Fluctuation phenomena; random processes; noise; and Brownian motion; 05.10.Gg Stochastic analysis methods (Fokker-Planck; Langevin; etc.); 64.60.-i General studies of phase transitions (search for similar items in EconPapers)
Date: 2008
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DOI: 10.1140/epjb/e2008-00035-y

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