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Published on: April 12, 2019
Efficient simulation protocol for determining the density of states: Combination of replica-exchange Wang-Landau
Takuya Hayashi1, Yuko Okamoto1,2,3,4,5
1Department of Physics, Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan.
Abstract:
By combining two generalized-ensemble algorithms, the replica-exchange Wang-Landau (REWL) method and the multicanonical replica-exchange method (MUCAREM), we propose an effective simulation protocol to determine the density of states with high accuracy. The new protocol is referred to as REWL-MUCAREM, and REWL is first performed and then MUCAREM is performed. In order to verify the effectiveness of our protocol, we performed simulations of a square-lattice Ising model using the three methods, namely REWL, MUCAREM, and REWL-MUCAREM. The results showed that the density of states obtained by REWL-MUCAREM is more accurate than that is estimated by the two methods separately.
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