Sampling the ground-state magnetization of d-dimensional p-body Ising models

Details Sampling the ground-state magnetization of d-dimensional p-body Ising models Sampling the ground-state magnetization of d-dimensional p-body Ising models

2011-08-09

arxiv.org/abs/1108.1953v2

Phys. Rev. B 84, 174404 (2011)

Physics

Condensed Matter

Disordered Systems and Neural Networks

8 pages, 6 figures, 3 tables

Scientific paper

10.1103/PhysRevB.84.174404

We demonstrate that a recently introduced heuristic optimization algorithm [Phys. Rev. E 83, 046709 (2011)] that combines a local search with triadic crossover genetic updates is capable of sampling nearly uniformly among ground-state configurations in spin-glass-like Hamiltonians with p-spin interactions in d space dimensions that have highly degenerate ground states. Using this algorithm we probe the zero-temperature ferromagnet to spin-glass transition point q_c of two example models, the disordered version of the two-dimensional three-spin Baxter-Wu model [q_c = 0.1072(1)] and the three-dimensional Edwards-Anderson model [q_c = 0.2253(7)], by computing the Binder ratio of the ground-state magnetization.

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