Dense matter is usually described using some kind of mean field theory (MFT) model based on Boltzmann–Gibbs (BG) extensive statistics. However, in many cases the conditions justifying the use of BG statistics are not fulfilled because the systems considered are explicitly nonextensive. In such cases one either enriches the original MFT by adding some dynamical elements violating extensivity (like, for example, long range correlations or intrinsic fluctuations), or one replaces the BG statistics by its nonextensive counterpart characterized by some nonextensivity parameter q ( q≠ 1 and for q → 1 one returns to the extensive situation). In this work, using a simple quasi-particle description of dense matter (with interaction modelled by effective fugacities, z) we discuss the mutual interplay of non-extensiveness and dynamics (i.e., q and z) and estimate the level of nonextensivity of the quark-gluon system described by lattice QCD.

中文翻译：

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是动态的非扩展性还是非扩展的动力学性？

通常使用基于玻尔兹曼–吉布斯（BG）广泛统计的某种平均场论（MFT）模型来描述稠密物质。但是，在许多情况下，由于所考虑的系统显然是不广泛的，因此无法满足使用BG统计数据的条件。在这种情况下，要么通过添加一些违反扩展性的动态元素（例如，长距离相关性或内在波动）来丰富原始MFT，要么用其以某些非扩展性参数q（q ≠1对于q →1，则返回到广泛的情况）。在这项工作中，我们使用对稠密物质的简单准粒子描述（具有通过有效逸度建模的相互作用，z）我们讨论了非扩展性和动力学（即q和z）的相互影响，并估计了由晶格QCD描述的夸克-胶子系统的非扩展性水平。