Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2008-06-05
Physics
Condensed Matter
Statistical Mechanics
30 pages, 17 figures. A new section added. Accepted for publication in Physica A
Scientific paper
We study the efficiency of parallel tempering Monte Carlo technique for calculating true ground states of the Edwards-Anderson spin glass model. Bimodal and Gaussian bond distributions were considered in two and three-dimensional lattices. By a systematic analysis we find a simple formula to estimate the values of the parameters needed in the algorithm to find the GS with a fixed average probability. We also study the performance of the algorithm for single samples, quantifying the difference between samples where the GS is hard, or easy, to find. The GS energies we obtain are in good agreement with the values found in the literature. Our results show that the performance of the parallel tempering technique is comparable to more powerful heuristics developed to find the ground state of Ising spin glass systems.
Nieto Felix
Ramirez-Pastor Antonio José
Risau-Gusman Sebastian
Roma Federico
Vogel Edward
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