We study the QCD phase structure at high temperature and density adopting a histogram method. Because the quark determinant is complex at finite density, the Monte-Carlo method cannot be applied directly. We use a reweighting method and try to solve the problems which arise in the reweighting method, i.e. the sign problem and the overlap problem. We discuss the chemical potential dependence of the probability distribution function in the heavy quark mass region and examine the applicability of the approach in the light quark region.
@article{arxiv.1203.3793,
title = {Numerical study of QCD phase diagram at high temperature and density by a histogram method},
author = {Shinji Ejiri and Sinya Aoki and Tetsuo Hatsuda and Kazuyuki Kanaya and Yoshiyuki Nakagawa and Hiroshi Ohno and Hana Saito and Takashi Umeda},
journal= {arXiv preprint arXiv:1203.3793},
year = {2017}
}
Comments
5 pages, 6 figures, presented at the International Conference "Critical Point and Onset of Deconfinement - CPOD 2011", Wuhan, November 7-11, 2011