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Canonical Demon Monte Carlo Renormalization Group

M. Hasenbusch, K. Pinn, C. Wieczerkowski

hep-latarXiv:hep-lat/9406019

Abstract

We describe a new method to compute renormalized coupling constants in a Monte Carlo renormalization group calculation. The method can be used for a general class of models, e.g., lattice spin or gauge models. The basic idea is to simulate a joint system of block spins and canonical demons. In contrast to the Microcanonical Renormalization Group invented by Creutz et al. our method does not suffer from systematical errors stemming from a simultaneous use of two different ensembles. We present numerical results for the O(3) nonlinear σ-model.

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