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Parallel tempering in full QCD with Wilson fermions

E. -M. Ilgenfritz·W. Kerler·M. Muller-Preussker·H. Stuben
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Abstract

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 $κ$ 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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E. -M. Ilgenfritz, W. Kerler, M. Muller-Preussker, H. Stuben. 2002-03-11. Parallel tempering in full QCD with Wilson fermions. https://doi.org/10.1103/physrevd.65.094506

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