Langevin Simulation of Scalar Fields: Additive and Multiplicative Noises and Lattice Renormalization
arXiv:0711.1866 · doi:10.1016/j.physa.2012.03.026
Abstract
We consider the Langevin lattice dynamics for a spontaneously broken lambda phi^4 scalar field theory where both additive and multiplicative noise terms are incorporated. The lattice renormalization for the corresponding stochastic Ginzburg-Landau-Langevin and the subtleties related to the multiplicative noise are investigated.
26 pages, 4 eps figures (Elsevier latex style)