Lattice QCD at finite temperature and density
Lattice QCD at finite temperature and density
复制标题
DOI：
10.1140/epjst/e2007-00376-3
复制
发表时间：
2007-08
期刊：
影响因子：
--
通讯作者：
O. Philipsen
中科院分区：
文献类型：
--
作者：
O. Philipsen
有限温度和密度下的量子色动力学对于从重离子物理到天体粒子物理的各种实验计划正变得越来越重要。 有限温度下非阿贝尔量子场论的非微扰性质使得格点QCD成为我们希望从第一原理得到可靠预言的唯一工具。这需要仔细外推到热力学，手性和连续极限，以消除离散化过程中引入的系统效应。在介绍了有限温度和有限密度下的格点QCD及其可能性和现有系统的局限性之后，对现有的数值结果进行了回顾。特别是，等离子体的性质，如状态方程，屏蔽质量，静态夸克自由能和光谱函数进行了讨论，以及临界温度和QCD相结构在零和有限密度。
QCD at finite temperature and density is becoming increasingly important for various experimental programmes, ranging from heavy ion physics to astro-particle physics. The non-perturbative nature of non-abelian quantum field theories at finite temperature leaves lattice QCD as the only tool by which we may hope to come to reliable predictions from first principles. This requires careful extrapolations to the thermodynamic, chiral and continuum limits in order to eliminate systematic effects introduced by the discretization procedure. After an introduction to lattice QCD at finite temperature and density, its possibilities and current systematic limitations, a review of present numerical results is given. In particular, plasma properties such as the equation of state, screening masses, static quark free energies and spectral functions are discussed, as well as the critical temperature and the QCD phase structure at zero and finite density.