Dresden 2011 – scientific programme

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SOE: Fachverband Physik sozio-ökonomischer Systeme

SOE 11: Poster Session

SOE 11.1: Poster

Tuesday, March 15, 2011, 18:05–18:45, P2

Ageing in the 3D random-bond Ising model along the ferromagnetic - spin glass transition line — •Markus Manssen and Alexander Hartmann — Institut für Physik, Carl-von-Ossietzky-Universität Oldenburg

Spin glasses, magnetic alloys showing disorder and frustration, are prototypical models of disordered systems and during the last decades they have been one of the main research topics in statistical physics. Since finite-dimensional spin glass models cannot be solved analytically, they are usually studied by computer simulations[1]. Yet the investigation of their main characteristic, their slow glassy behavior, demands long computation times and thus spawned dedicated specialized computing systems[2]. Using the huge computational resources on graphic cards promises noticeable speedups for largely parallel problems compared to common CPUs at a reasonable cost. Simulations of simple Ising models have already been realized[3].
Building on this we turn our attention to the random-bond ± J Ising model which allows us to investigate ageing effects when crossing from the ferromagnetic to the spin-glass phase by measuring two-time correlation functions.

[1] A.K. Hartmann, Practical Guide to Computer Simulations, World Scientific, 2009

[2] F. Belletti et al., Ianus: An Adaptive FPGA Computer, Computing in Science and Eng., vol. 8, no. 1, 2006, pp. 41-48.

[3] M. Weigel, Simulating spin models on GPU, Preprint arXiv:1006.3865v1