Energy barriers of spin glasses from multi-overlap simulations
arXiv:cond-mat/9811423 · doi:10.1002/(SICI)1521-3889(199811)7:5/6<544::AID-ANDP544>3.0.CO;2-1
Abstract
We report large-scale simulations of the three-dimensional Edwards-Anderson Ising spin glass system using the recently introduced multi-overlap Monte Carlo algorithm. In this approach the temperature is fixed and two replica are coupled through a weight factor such that a broad distribution of the Parisi overlap parameter is achieved. Canonical expectation values for the entire -range (multi-overlap) follow by reweighting. We present an analysis of the performance of the algorithm and in particular discuss results on spin glass free-energy barriers which are hard to obtain with conventional algorithms. In addition we discuss the non-trivial scaling behavior of the canonical -distributions in the broken phase.
10 pages, Latex, 9 Postscript figures