通过在gluodynamics和QCD中过度改进的冷却研究有限温度转变的拓扑
Topology across the finite temperature transition studied by overimproved cooling in gluodynamics and QCD
摘要：
本文用过改进冷却技术研究了非零温度下的胶子动力学和双味QCD。我们考虑拓扑电荷第一个稳定平台或第一个（反）自偶平台的拓扑构型，并在热转变或交叉两侧的不同温度下找到相应的拓扑磁化率。在纯胶子动力学中，拓扑磁化率在解除禁闭温度下急剧下降，而在全QCD中，它在伪临界温度以上平稳下降。计算结果与其它方法的计算结果接近。我们解释我们的研究结果在稳定的calorons与非平凡的holonomy和他们的双子成分对过度改善冷却。
英文摘要：
Gluodynamics and two-flavor QCD at non-zero temperature are studied with the so-called overimproved cooling technique under which caloron solutions may remain stable. We consider topological configurations either at the first occuring stable plateau of topological charge or at the first (anti)selfdual plateau and find the corresponding topological susceptibility at various temperatures on both sides of the thermal transition or crossover. In pure gluodynamics the topological susceptibility drops sharply at the deconfinement temperature while in full QCD it decreases smoothly at temperatures above the pseudocritical one. The results are close to those calculated by other methods. We interpret our findings in terms of the (in)stability of calorons with non-trivial holonomy and their dyon constituents against overimproved cooling.
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