Fast Algorithm to Calculate Density of States

Details Fast Algorithm to Calculate Density of States Fast Algorithm to Calculate Density of States

2007-01-26

arxiv.org/abs/cond-mat/0701672v2

Physics

Condensed Matter

Statistical Mechanics

5 pages, 5 figures

Scientific paper

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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