An application of the UV-filtering preconditioner to the Polynomial Hybrid Monte Carlo algorithm
CS Collaboration, K-I. Ishikawa, S. Aoki, T. Ishikawa, N. Ishizuka, K. Kanaya, Y. Kuramashi, M. Okawa, Y. Taniguchi, A. Ukawa, T. Yoshie
Abstract
We apply the UV-filtering preconditioner, previously used to improve the Multi-Boson algorithm, to the Polynomial Hybrid Monte Carlo (UV-PHMC) algorithm. The performance test for the algorithm is given for the plaquette gauge action and the O(a)-improved Wilson action at β=5.2, csw=2.02, Mπ/Mρ 0.8 and 0.7 on a 163× 48 lattice. We find that the UV-filtering reduces the magnitude of the molecular dynamics force from the pseudo fermion by a factor 3 by tuning the UV-filter parameter. Combining with the multi-time scale molecular dynamics integrator we achieve a factor 2 improvement.
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