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DY: Fachverband Dynamik und Statistische Physik

DY 29: Poster II

DY 29.6: Poster

Thursday, February 28, 2008, 16:00–18:00, Poster C

Techniques accelerating the dynamics of simulations of complex systems — •Frank Beyer, Elmar Bittner, and Wolfhard Janke — Institut für Theoretische Physik, Universität Leipzig, D-04009 Leipzig

Complex systems such as spin glasses simulated with local update schemes in the framework of Markov Chain Monte Carlo Simulations exhibit strong autocorrelations resulting in a slow dynamics especially pronounced in the temperature regime below the glass transition. Due to the rough energy landscape, trappings in local energy minima can be handled with (combinations of) different techniques such as parallel tempering and multicanonical simulations lowering relaxation times and autocorrelations. Our poster contains on the one hand a discussion of these methods with special attention to autocorrelation times giving a measure for assessing the goodness of a random walk. On the other hand it includes a survey on inherent structures and their highly degenerate configurations with minimal energy. Both issues concentrate on the 3d Edwards-Anderson spin glass model with bimodal interactions.