Regensburg 2007 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 17: Glass II (joint session with DF)

DY 17.7: Vortrag

Dienstag, 27. März 2007, 16:30–16:50, H23

Free energy fluctuations in the Sherrington Kirkpatrick spin glass — •Martin Goethe and Timo Aspelmeier — Institut für Theoretische Physik, Georg-August-Universität Göttingen, Germany

A new numerical method of calculating the sample to sample fluctuations Δ F of the free energy in the Sherrington Kirkpatrick spin glass will be presented which is based on an interpolating Hamiltonian and works for all temperatures 0<T<∞. By its use the scaling behaviour of Δ F in the spin glass phase is obtained. It strongly disagrees with previous numerical studies at zero temperature. Finally possible explanations for the difference and arising consequences will be discussed.