Multi-overlap simulations of spin glasses

Details Multi-overlap simulations of spin glasses Multi-overlap simulations of spin glasses

2001-12-03

arxiv.org/abs/cond-mat/0112036v1

NIC Series - Publication Series of the John von Neumann Institute for Computing, J\"ulich, 9, 301-314 (2002)

Physics

Condensed Matter

Disordered Systems and Neural Networks

14 pages, Latex, 18 Postscript figures, to be published in NIC Series - Publication Series of the John von Neumann Institute f

Scientific paper

We present results of recent high-statistics Monte Carlo simulations of the Edwards-Anderson Ising spin-glass model in three and four dimensions. The study is based on a non-Boltzmann sampling technique, the multi-overlap algorithm which is specifically tailored for sampling rare-event states. We thus concentrate on those properties which are difficult to obtain with standard canonical Boltzmann sampling such as the free-energy barriers F^q_B in the probability density P_J(q) of the Parisi overlap parameter q and the behaviour of the tails of the disorder averaged density P(q) = [P_J(q)]_av.

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