Hysteretic optimization is a heuristic optimization method based on the observation that magnetic samples are driven into a low-energy state when demagnetized by an oscillating magnetic field of decreasing amplitude. We show that hysteretic optimization is very good for finding ground states of Sherrington-Kirkpatrick spin glass systems. With this method it is possible to get good statistics for ground state energies for large samples of systems consisting of up to about 2000 spins. The way we estimate error rates may be useful for some other optimization methods as well. Our results show that both the average and the width of the ground state energy distribution converges faster with increasing size than expected from earlier studies.
|Number of pages||8|
|Journal||Physica A: Statistical Mechanics and its Applications|
|Publication status||Published - Jul 15 2006|
- Spin glass
ASJC Scopus subject areas
- Statistics and Probability
- Condensed Matter Physics