A faster method of computation of lattice quark number susceptibilities

Details A faster method of computation of lattice quark number susceptibilities A faster method of computation of lattice quark number susceptibilities

2011-12-22

arxiv.org/abs/1112.5428v1

Physics

High Energy Physics

High Energy Physics - Lattice

10 pages, 12 figures

Scientific paper

We compute the quark number susceptibilities in two flavor QCD for staggered fermions by adding the chemical potential as a Lagrange multiplier for the point-split number density term. Since lesser number of quark propagators are required at any order, this method leads to faster computations. We propose a subtraction procedure to remove the inherent undesired lattice terms and check that it works well by comparing our results with the existing ones where the elimination of these terms is analytically guaranteed. We also show that the ratios of susceptibilities are robust, opening a door for better estimates of location of the QCD critical point through the computation of the tenth and twelfth order baryon number susceptibilities without significant additional computational overload.

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