标题： 夸克-胶子等离子体理论 显示英文标题

标题： Theory of the Quark-Gluon Plasma

摘要： 这些讲座是对使用弱耦合技术研究QCD高温相的最新进展的介绍。 在简要介绍了有限温度下量子场论的一些技术之后，我继续分析夸克胶子等离子体的各种重要尺度和自由度，并重点关注在特定动量尺度$gT$处发展的集体模式的有效理论，其中$g$是规范耦合，$T$是温度。 构建有效理论的一种强大技术是基于描述硬自由度动力学的动能方程。 一些由这种有效理论描述的集体现象被简要提及。 然后我转向夸克胶子等离子体熵的计算，并展示如何在（近似）自洽计算中利用有效理论中的信息。 显示英文摘要

摘要： These lectures are an introduction to recent developments in the study of the high temperature phase of QCD by using weak coupling techniques. After a brief introduction to some techniques of quantum field theory at finite temperature, I proceed to an analysis of the various important scales and degrees of freedom of the quark-gluon plasma and focus on the effective theory for the collective modes which develop at the particular momentum scale $gT$, where $g$ is the gauge coupling and $T$ the temperature. A powerful technique to construct the effective theory is based on kinetic equations which govern the dynamics of the hard degrees of freedom. Some of the collective phenomena that are described by this effective theory are briefly mentioned. Then I turn to the calculation of the entropy of the quark-gluon plasma and show how the information coded in the effective theory can be exploited in (approximately) self-consistent calculations.