Histograms in heavy-quark QCD at finite temperature and density
Histograms in heavy-quark QCD at finite temperature and density
复制标题
有限温度和密度下重夸克 QCD 的直方图
DOI：
10.1103/physrevd.89.034507
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发表时间：
2014
影响因子：
5
通讯作者：
K. Okuno and T. Umeda
中科院分区：
文献类型：
--
作者：
H. Saito;S. Ejiri;S. Aoki;K. Kanaya;Y. Nakagawa;H. Ohno;K. Okuno and T. Umeda
用直方图方法研究了有限温度和密度下重夸克晶格QCD的相结构。通过改变耦合参数下直方图的形状，我们确定了重夸克极限的一阶解禁闭跃迁转变为中等夸克质量的交叉的临界点的位置。我们估计了在有限密度下引起符号问题的复相因子的影响，结果表明，在重夸克QCD中，在临界点附近影响很小。在化学势的所有值下，我们确定了重夸克区的临界表面膨胀Qcd。
We study the phase structure of lattice QCD with heavy quarks at finite temperature and density by a histogram method. We determine the location of the critical point at which the first-order deconfining transition in the heavy-quark limit turns into a crossover at intermediate quark masses through a change of the shape of the histogram under variation of coupling parameters. We estimate the effect of the complex phase factor, which causes the sign problem at finite density, and show that, in heavy-quark QCD, the effect is small around the critical point. We determine the critical surface inflavor QCD in the heavy-quark region at all values of the chemical potentialincluding.