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Fast Algorithm to Calculate Density of States

R. E. Belardinelli·V. D. Pereyra
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Abstract

An algorithm to calculate the density of states, based on the well-known Wang-Landau method, is introduced. Independent random walks are performed in different restricted ranges of energy, and the resultant density of states is modified by a function of time, F(t)=1/t, for large time. As a consequence, the calculated density of state, gm(E,t), approaches asymptotically the exact value gex(E) as 1/sqrt(t), avoiding the saturation of the error. It is also shown that the growth of the interface of the energy histogram belongs to the random deposition universality class.

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R. E. Belardinelli, V. D. Pereyra. 2007-12-29. Fast Algorithm to Calculate Density of States. https://doi.org/10.1103/physreve.75.046701

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