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arXiv · hep-lat/9801022

Perfect Actions with Chemical Potential

W. Bietenholz·U. -J. Wiese
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Abstract

We show how to include a chemical potential μin perfect lattice actions. It turns out that the standard procedure of multiplying the quark fields Ψ, \barΨat Euclidean time t by \exp(\pm μt), respectively, is perfect. As an example, the case of free fermions with chemical potential is worked out explicitly. Even after truncation, cut-off effects in the pressure and the baryon density are small. Using a (quasi-)perfect action, numerical QCD simulations for non-zero chemical potential become more powerful, because coarse lattices are sufficient for extracting continuum physics.

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BibTeXRIS

W. Bietenholz, U. -J. Wiese. 1998-01-19. Perfect Actions with Chemical Potential. https://doi.org/10.1016/s0370-2693(98)00269-x

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