5 papers · 1 filter
Contact process on a Voronoi triangulation
Marcelo M. de Oliveira, S. G. Alves, S. C. Ferreira +1
We study the continuous absorbing-state phase transition in the contact process on the Voronoi-Delaunay lattice. The Voronoi construction is a natural way to introduce quenched coo…
How to simulate the quasi-stationary state
Marcelo Martins de Oliveira, Ronald Dickman
For a large class of processes with an absorbing state, statistical properties of the surviving sample attain time-independent values in the quasi-stationary (QS) regime. We propos…
Comment on cond-mat/0107371: ``Dynamical exponents of an even-parity-conserving contact process with diffusion''
Marcio Argollo de Menezes, Ronald Dickman
In cond-mat/0107371, Mendonca proposes that diffusion can change the universality class of a parity-conserving reaction-diffusion process. In this comment we suggest that this cann…
Ising Meets Ornstein and Zernike, Debye and Huckel, Widom and Rowlinson, and Others
Ronald Dickman
The name Ising has come to stand not only for a specific model, but for an entire universality class - arguably the most important such class - in the theory of critical phenomena.…
Nonuniversality and critical point shift in systems with infinitely many absorbing configurations
Ronald Dickman
A detailed study of critical spreading in the one-dimensional pair contact process is performed using a recently devised reweighting method. The results confirm the validity of a g…