Parallel tempering in full QCD with Wilson fermions

Details Parallel tempering in full QCD with Wilson fermions Parallel tempering in full QCD with Wilson fermions

2001-11-21

arxiv.org/abs/hep-lat/0111038v3

Phys.Rev. D65 (2002) 094506

Physics

High Energy Physics

High Energy Physics - Lattice

16 pages, 3 figures

Scientific paper

10.1103/PhysRevD.65.094506

We study the performance of QCD simulations with dynamical Wilson fermions by combining the Hybrid Monte Carlo algorithm with parallel tempering on $10^4$ and $12^4$ lattices. In order to compare tempered with standard simulations, covariance matrices between sub-ensembles have to be formulated and evaluated using the general properties of autocorrelations of the parallel tempering algorithm. We find that rendering the hopping parameter $\kappa$ dynamical does not lead to an essential improvement. We point out possible reasons for this observation and discuss more suitable ways of applying parallel tempering to QCD.

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