108 research outputs found
Some recent developments in models with absorbing states
We describe some of the recent results obtained for models with absorbing
states. First, we present the nonequilibrium absorbing-state Potts model and
discuss some of the factors that might affect the critical behaviour of such
models. In particular we show that in two dimensions the further neighbour
interactions might split the voter critical point into two critical points. We
also describe some of the results obtained in the context of synchronization of
chaotic dynamical systems. Moreover, we discuss the relation of the
synchronization transition with some interfacial models.Comment: 8 pages, Brazilian J. of Physics (in press
Slow dynamics in a driven two-lane particle system
We study a two-lane model of two-species of particles that perform biased
diffusion. Extensive numerical simulations show that when bias q is strong
enough oppositely drifting particles form some clusters that block each other.
Coarsening of such clusters is very slow and their size increases
logarithmically in time. For smaller q particles collapse essentially on a
single cluster whose size seems to diverge at a certain value of q=q_c.
Simulations show that despite slow coarsening, the model has rather large
power-law cooling-rate effects. It makes its dynamics different from glassy
systems, but similar to some three-dimensional Ising-type models (gonihedric
models).Comment: minor changes, final versio
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