强相互作用夸克-胶子等离子体和虚化学势下QCD的临界行为
The strongly interacting Quark Gluon Plasma, and the critical behaviour of QCD at imaginary chemical potential
摘要：
我们探索的QCD相图的高度非微扰热区域接近Tc通过使用一个虚的化学势μ，从而避免了符号问题。数密度和夸克数磁化率与负μ ^2半平面中跃迁线的临界行为一致。我们比较分析这些结果的延续与各种唯象模型，没有一个提供了令人满意的数据描述，失败，我们做一些评论。这些结果的补充和扩展的信息，通过在零亩评估的可测量性的分析，产生一个简单的描述候选人强相互作用的QGP阶段。作为我们的分析的副产品，我们调查的Polyakov循环和厄米共轭。我们的数据提供了一个生动的证据的重要性的复杂性质的功能性的积分措施，这导致在L（亩）ne \bar L（亩）的一个真正的化学势。
英文摘要：
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.
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