Canonical partition function and finite density phase transition in lattice QCD

被引：205

作者：

Ejiri, Shinji ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW D | 2008年 / 78卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.78.074507

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We discuss the nature of the phase transition for lattice QCD at finite temperature and density. We propose a method to calculate the canonical partition function by fixing the total quark number introducing approximations allowed in the low density region. An effective potential as a function of the quark number density is discussed from the canonical partition function. We analyze data obtained in a simulation of two-flavor QCD using p4-improved staggered quarks with bare quark mass m/T=0.4 on a 16(3)x4 lattice. The results suggest that the finite density phase transition at low temperature is of first order.

引用

页数：13

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