Vladislav Popkov et al 2008 J. Phys. A: Math. Theor. 41 432002 doi:10.1088/1751-8113/41/43/432002
Vladislav Popkov1,2, Martin R Evans3 and David Mukamel4
Show affiliationsWe introduce a class of 1D models mimicking a single-lane bridge with two junctions and two particle species driven in opposite directions. The model exhibits spontaneous symmetry breaking (SSB) for a range of injection/extraction rates. In this phase the steady-state currents of the two species are not equal. Moreover, there is a co-existence region in which the symmetry-broken phase co-exists with a symmetric phase. Along a path in which the extraction rate is varied, keeping the injection rate fixed and large, hysteresis takes place. The mean-field phase diagram is calculated and supporting Monte Carlo simulations are presented. One of the transition lines exhibits a kink, a feature which cannot exist in transition lines of equilibrium phase transitions.
82C26 Dynamic and nonequilibrium phase transitions (general)
82C80 Numerical methods (Monte Carlo, series resummation, etc.)
60Bxx Probability theory on algebraic and topological structures
Issue 43 (31 October 2008)
Received 29 July 2008, in final form 11 September 2008
Published 1 October 2008
Vladislav Popkov et al 2008 J. Phys. A: Math. Theor. 41 432002
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