ISSN:
1572-9613
Keywords:
nonequilibrium systems
;
driven lattice gases
;
Langevin equations
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We define a soft-spins approach to the driven lattice gas model (C-DLG) at the level of a master equation. As a result, we obtain a Langevin equation for the C-DLG which depends on the microscopic transition probabilities. We then show how this dependence affects the critical behavior of the the C-DLG, placing the finite- and the infinite-driving-field cases into different universality classes. In the same vein, we propose a continuum description of two other well-known anisotropic, conservative, nonequilibrium models: the two-temperature model (C-TT) and the randomly driven model (C-RDLG). We show that the C-RDLG with infinite averaged field and the C-TT with T ‖=∞ fall in the same universality class as the infinitely driven C-DLG. A Langevin equation for the driven bilayer lattice gas model is also presented.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1004580618162
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