Abstract
A version of the extremal optimization (EO) algorithm introduced by Boettcher and Percus is tested on two- and three-dimensional spin glasses with Gaussian disorder. EO preferentially flips spins that are locally “unfit”; the variant introduced here reduces the probability of flipping previously selected spins. Relative to EO, this adaptive algorithm finds exact ground states with a speedup of order for samples. This speedup increases rapidly with system size, making this heuristic a useful tool in the study of materials with quenched disorder.
- Received 10 February 2004
DOI:https://doi.org/10.1103/PhysRevE.69.055701
©2004 American Physical Society