@article{oai:tsukuba.repo.nii.ac.jp:00028128, author = {青木, 愼也 and 金谷, 和至 and Ejiri, Shinji and Aoki, Sinya and Hatsuda, Tetsuo and Kanaya, Kazuyuki and Nakagawa, Yoshiyuki and Ohno, Hiroshi and Saito, Hana and Umeda, Takashi}, issue = {6}, journal = {Central European journal of physics}, month = {Dec}, note = {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.}, pages = {1322--1325}, title = {Numerical study of QCD phase diagram at high temperature and density by a histogram method}, volume = {10}, year = {2012} }