Multicanonical multigrid Monte Carlo method and effective autocorellation time

Abstract

We report tests of the recently proposed multicanonical multigrid Monte Carlo method for the two-dimensional ${\Phi }^4$ field theory. Defining an effective autocorrelation time we obtain real time improvement factors of about one order of magnitude compared with standard multicanonical simulations.

Comments: contribution to LATTICE'93 proceedings, 3 pp. in postscript format, FU-Berlin preprint FUB-HEP 18-93