Accelerating the Hybrid Monte Carlo algorithm

Details Accelerating the Hybrid Monte Carlo algorithm Accelerating the Hybrid Monte Carlo algorithm

2003-03-28

arxiv.org/abs/hep-lat/0303026v1

Phys.Lett.B564:235-240,2003

Physics

High Energy Physics

High Energy Physics - Lattice

6 pages, latex

Scientific paper

10.1016/S0370-2693(03)00703-2

An algorithm for separating the high- and low-frequency molecular dynamics modes in Hybrid Monte Carlo simulations of gauge theories with dynamical fermions is presented. The separation is based on splitting the pseudo-fermion action into two parts, as was initially proposed by Hasenbusch. We propose to introduce different evolution time-scales for each part. We test our proposal in realistic simulations of two-flavor O(a) improved Wilson fermions. A speed-up of more than a factor of three compared to the standard HMC algorithm is observed in a typical run.

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