An application of the UV-filtering preconditioner to the Polynomial Hybrid Monte Carlo algorithm

Details An application of the UV-filtering preconditioner to the Polynomial Hybrid Monte Carlo algorithm An application of the UV-filtering preconditioner to the Polynomial Hybrid Monte Carlo algorithm

2006-10-05

arxiv.org/abs/hep-lat/0610037v2

PoSLat2006:027,2006

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 1 figure, talk presented at Lattice2006 (Algorithm), PoS format; v2 references added

Scientific paper

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 $\beta=5.2, c_{\mathrm{sw}}=2.02, M_{\pi}/M_{\rho}\sim 0.8$ and 0.7 on a $16^3\times 48$ 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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