The strongly interacting Quark Gluon Plasma, and the critical behaviour of QCD at imaginary chemical potential
The strongly interacting Quark Gluon Plasma, and the critical behaviour of QCD at imaginary chemical potential
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强相互作用的夸克胶子等离子体，以及 QCD 在虚化学势下的临界行为
DOI：
10.1103/physrevd.76.114509
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发表时间：
2007
影响因子：
5
通讯作者：
M. Lombardo
中科院分区：
文献类型：
--
作者：
M. D’Elia;F. Renzo;M. Lombardo
我们探索了QCD相图的高度非微扰热区
通过使用避免符号的虚化学势μ来接近Tc
问题.数密度和夸克数磁化率是一致的
与负的过渡线相关的临界行为
μ ^2半平面。我们比较这些结果的解析延拓与
各种现象学模型，其中没有一个提供了令人满意的
数据的描述，我们对此做一些评论的失败。这些结果
补充和扩展通过分析所获得的信息，
在零mu下评估的磁化率，产生了对
候选强相互作用QGP相。作为我们分析的副产品，
研究了Polyakov环及其厄米共轭。我们的数据提供了
的重要性的生动证据的复杂性质的功能
积分测量，其导致真实的化学物质的L（mu）ne \bar L（mu
潜力
We explore the highly non-perturbative hot region of the QCD phase diagram
close to Tc by use of an imaginary chemical potential mu which avoids the sign
problem. The number density and the quark number susceptibility are consistent
with a critical behaviour associated with the transition line in the negative
mu^2 half-plane. We compare the analytic continuation of these results with
various phenomenological models, none of which provides a satisfactory
description of data, a failure on which we make some comments. These results
complement and extend the information obtained via the analysis of the
susceptibilities evaluated at zero mu, yielding a simple description of the
candidate strongly interacting QGP phase. As a byproduct of our analysis we
investigate the Polyakov loop and its hermitian conjugate. Our data offer a
vivid evidence of the importance of the complex nature of the functional
integral measure, which results in L (mu) ne \bar L(mu) for a real chemical
potential.