Performance of Replica-Exchange Wang-Landau Sampling for the 2D Ising Model: A Brief Survey

Conference · Wed Jan 01 04:00:00 EST 2014

OSTI ID:1156752

Zhao, Yiwei ^[1]; Cheung, Siu Wun ^[1]; Li, Ying Wai ^[2]; Eisenbach, Markus ^[2]

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1. Chinese University of Hong Kong (CUHK)
2. ORNL

We report a brief performance study of the replica-exchange Wang-Landau algorithm, a recently proposed parallel realization of Wang-Landau sampling, using the 2D Ising model as a test case. The simulation time is found to scale inversely with the square root of the number of subwindows (and thus number of processors) used to span the global parameter space. We also investigate the time profiles for random walkers in dierent subwindows to complete iterations, which will aid the development of and adaptive load-balancing scheme.

• Research Organization: Oak Ridge National Laboratory (ORNL); Joint Institute for Computational Sciences (JICS)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1156752
• Country of Publication: United States
• Language: English