Volume 70, Number 2, April 2005
|Page(s)||155 - 161|
|Published online||18 March 2005|
ParQ —high-precision calculation of the density of states
Institut für Physik, Technische Universität Chemnitz - D-09107 Chemnitz, Germany
Corresponding author: email@example.com
Accepted: 2 March 2005
We present a highly effective, parallelized random-walk–based algorithm to calculate the density of states of complex physical systems. Random walkers' attempted moves from one energy level to another are represented in a stochastic matrix, giving estimates for the transition matrix at infinite temperature. The eigenvector corresponding to the largest eigenvalue is the density of states up to a normalization. We verify the performance on selected examples of Ising spin systems with random coupling constants drawn uniformly from , of which the exact density of states has been calculated by a branch-and-bound approach.
PACS: 02.50.Ga – Markov processes / 05.10.Ln – Monte Carlo methods / 05.50.+q – Lattice theory and statistics (Ising, Potts, etc.)
© EDP Sciences, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.