A new approach to the study of the ground-state properties of 2D Ising spin glass

Details A new approach to the study of the ground-state properties of 2D Ising spin glass A new approach to the study of the ground-state properties of 2D Ising spin glass

2000-04-04

arxiv.org/abs/cond-mat/0004028v1

Physica A, 285 (2000) 239.

Physics

Condensed Matter

Statistical Mechanics

11 pages, 4 figures

Scientific paper

10.1016/S0378-4371(00)00285-5

A new approach known as flat histogram method is used to study the +/-J Ising spin glass in two dimensions. Temperature dependence of the energy, the entropy, and other physical quantities can be easily calculated and we give the results for the zero-temperature limit. For the ground-state energy and entropy of an infinite system size, we estimate e0 = -1.4007 +/- 0.0085 and s0 = 0.0709 +/- 0.006, respectively. Both of them agree well with previous calculations. The time to find the ground-states as well as the tunneling times of the algorithm are also reported and compared with other methods.

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