Complex Probability Distributions: A Solution for the LongStanding Problem of QCD at Finite Density
Abstract
We show how the prescription of taking the absolute value of the fermion determinant in the integration measure of QCD at finite density, forgetting its phase, reproduces the correct thermodynamical limit. This prescription, which applies also to other gauge theories with nonpositivedefinite integration measure, also has the advantage of killing finite size effects due to extremely small mean values of the cosine of the phase of the fermion determinant. We also give an explanation for the pathological behaviour of quenched QCD at finite density.
 Publication:

arXiv eprints
 Pub Date:
 July 1996
 arXiv:
 arXiv:heplat/9607071
 Bibcode:
 1996hep.lat...7071A
 Keywords:

 High Energy Physics  Lattice
 EPrint:
 7 pages, latex, no figures