ISSN:
1572-9613
Keywords:
Driven Kawasaki models
;
stochastic lattice gas
;
non-equilibrium phase transitions
;
computer simulations
;
finite-size scaling
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The field-driven Kawasaki model with a fractionp admixture of Glauber dynamics is studied by computer simulation:p=0 corresponds to the order-parameter-onserving driven diffusive system, whilep=1 is the equilibrium Ising model. Forp=0.1 our best estimates of critical exponents based on a system of size 4096×128 areβ≈0.22, ηRS≈0.45, andv ‖≈v ⊥≈1. These exponents differ from both the values predicted by a field-theoretic method forp=0 and those of the equilibrium Ising model. Anisotropic finite-size scaling analyses are carried out, both for subsystems of the large system and for fully periodic systems. The results of the latter, however, are inconsistent, probably due to the complexity of the size effects. This leaves open the possibility that we are in a crossover regime fromp=0 top≠0 and that our critical exponents are “effective ones.” Forp=0 our results are consistent with the predictionsv ‖〉v ⊥.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01016780
Permalink
