Accurate Estimate of the Joint Density of States via Flat Scan Sampling

A Monte Carlo method to estimate the Joint Density of States g(E,M) of the Ising and Ising-like models is presented. The method is applied to the well-known 2D Ising model, and is shown to be accurate, efficient, and embarrassingly parallel. The method presented offers major improvements over existing approaches. Furthermore, we obtain g(E,M) estimates for the spin S Ising model, with the spin number S = {1/2, 1, 3/2, 2}, thus showing that the algorithm can handle larger and more complex (E, M) phase spaces.

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