Regensburg 2007 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 17: Glass II (joint session with DF)

DY 17.8: Vortrag

Dienstag, 27. März 2007, 16:50–17:10, H23

Free energy fluctuations and chaos in mean-field spin glasses — •Timo Aspelmeier — Institut für Theoretische Physik, Universität Göttingen

The sample-to-sample fluctuations Δ F of the free energy in the mean-field Ising spin glass are a long standing unsolved problem in spin glass physics. Here we show that Δ F is intimately connected to an apparently unrelated phenomenon, namely chaos in spin glasses. Chaos in spin glasses, first suggested within the droplet model for finite-dimensional spin glasses, also exists for the mean-field spin glass. This opens up a new way to calculate Δ F analytically. Since Δ F is related not only to chaos but also to domain wall energies in finite dimensional spin glasses, our results have direct bearing on spin glass physics in finite dimensions.