Dresden 2011 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 40: Posters II

DY 40.35: Poster

Donnerstag, 17. März 2011, 17:00–19:00, P3

Worm algorithm in ordered and disordered media — •Martin Marenz and Wolfhard Janke — Institut für theoretische Physik, Universität Leipzig, Germany

The Worm algorithm is a Monte Carlo method that uses the high-temperature expansion series for simulating spin systems. It was introduced by Prokof'ev and Svistinov in 2001.

This work and a few other papers suggest that this algorithm does not suffer from critical slowing down. We investigated the critical behavior of the algorithm, which means we have calculated the dynamic critical exponents. This procedure has also been repeated for bond-disordered and site-diluted systems, therefore we expanded the algorithm to such systems and introduced several estimators for common observables. We could affirm that the critical slowing down has no practical influence for the Worm algorithm, this also holds true for disordered and diluted systems. Furthermore, we have introduced a reweighting method.