A Brief Overview of Hard-Thermal-Loop Perturbation Theory

作     者：苏楠 

作者机构：Fakultt fr PhysikUniversitt BielefeldD-33615 BielefeldGermany 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2012年第57卷第3期

页      面：409-421页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：Alexander von Humboldt Foundation 

主　　题：thermal field theory resummation hard thermal loops 

摘      要：The poor convergence of quantum field theory at finite temperature has been one of the main obstacles in the practical applications of thermal QCD for *** we briefly review the progress of hard-thermal-loop perturbation theory (HTLpt) in reorganizing the perturbative expansion in order to improve the *** quantum mechanical anharmonic oscillator is used as a simple example to show the breakdown of weak-coupling expansion,and variational perturbation theory is introduced as an effective resummation scheme for divergent weak-coupling *** discuss HTLpt thermodynamic calculations for QED,pure-glue QCD,and QCD with N f=3 up to three-loop *** results suggest that HTLpt provides a systematic framework that can be used to calculate both static and dynamic quantities for temperatures relevant at LHC.