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How to evaluate ground-state landscapes of disordered systems thermodynamical correctly
- Publication Year :
- 1999
- Publisher :
- arXiv, 1999.
-
Abstract
- Ground states of three-dimensional EA Ising spin glasses are calculated for sizes up to 14^3 using a combination of a genetic algorithm and cluster-exact approximation. For each realization several independent ground states are obtained. Then, by applying ballistic search and T=0 Monte-Carlo simulations, it is ensured that each ground state appears with the same probability. Consequently, the results represent the true T=0 thermodynamic behavior. The distribution P(|q|) of overlaps is evaluated. For increasing size the width of P(|q|) and the fraction of the distribution below q_0=0.5 converge to zero. This indicates that for the infinite system P(|q|) is a delta function, in contrast to previous results. Thus, the ground-state behavior is dominated by few large clusters of similar ground states.<br />Comment: 7 pages revtex, 6 figures, 27 references
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....994ece8204f20ca138ea920ceea51cc2
- Full Text :
- https://doi.org/10.48550/arxiv.cond-mat/9906270