Trajectory Length and Autocorrelation Times -- Nf=2 simulations in the Schroedinger functional

Details Trajectory Length and Autocorrelation Times -- Nf=2 simulations in the Schroedinger functional Trajectory Length and Autocorrelation Times -- Nf=2 simulations in the Schroedinger functional

2006-09-13

arxiv.org/abs/hep-lat/0609021v1

PoSLAT2006:032,2006

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 4 figures: LATTICE 06 (Tucson,AZ) proceedings

Scientific paper

A status report is presented on the large-volume simulations in the Schroedinger functional with two flavours of O(a) improved Wilson quarks performed by the ALPHA collaboration. The physics goal is to set the scale for the computation of the fundamental parameters of QCD. In this talk the emphasis is on aspects of the Hybrid Monte-Carlo algorithm, which we use with (symmetric) even-odd and Hasenbusch preconditioning. We study the dependence of aucorrelation times on the trajectory length. The latter is found to be significant for fermionic correlators, the trajectories longer than unity performing better than the shorter ones.

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