Volume 81, Number 3, February 2008
Article Number 30005
Number of page(s) 6
Section General
Published online 31 December 2007
EPL, 81 (2008) 30005
DOI: 10.1209/0295-5075/81/30005

Nonequilibrium tricriticality in one dimension

Jaya Maji and Somendra M. Bhattacharjee

Institute of Physics - Bhubaneswar-751005, India

received 28 August 2007; accepted in final form 29 November 2007; published February 2008
published online 31 December 2007

We show the existence of a nonequilibrium tricritical point induced by a repulsive interaction in one-dimensional asymmetric exclusion processes. The tricritical point is associated with the particle-hole symmetry breaking introduced by the repulsion. The phase diagram and the crossover in the neighbourhood of the tricritical point for the shock formation at one of the boundaries are determined.

05.40.-a - Fluctuation phenomena, random processes, noise, and Brownian motion.
02.50.Ey - Stochastic processes.
64.60.-i - General studies of phase transitions.

© EPLA 2008