论文标题
有限的盒子作为将自由夸克与高温下限制区分开的工具
A finite box as a tool to distinguish free quarks from confinement at high temperatures
论文作者
论文摘要
在QCD中出现了手性对称性恢复的伪智性温度T_C T_C T_C（手性旋转对称性（颜色电荷和电气限制的对称性））的上方。这意味着QCD处于限制模式，没有免费的夸克。同时，运算符的相关器受保守的电流的约束，就像夸克是免费的。这解释了观察到的保守电荷的波动以及通过二甲蛋白酶观察到的Rho样结构的缺失。一个独立的证据表明，一个人处于限制模式。在这里，我们建议一种新工具如何将自由夸克与限制模式区分开。如果我们将系统放入有限的盒子中，则如果夸克是免费的，则必须在保守电流的传播器中获得显着的衍射图案。在有限盒中的晶格计算中可以清楚地看到这种模式，并且在无限的体积极限以及连续体中消失。相比之下，有限盒中的完整QCD计算表明，没有衍射模式，这表明夸克被限制。
Above the pseudocritical temperature T_c of chiral symmetry restoration a chiral spin symmetry (a symmetry of the color charge and of electric confinement) emerges in QCD. This implies that QCD is in a confining mode and there are no free quarks. At the same time correlators of operators constrained by a conserved current behave as if quarks were free. This explains observed fluctuations of conserved charges and the absence of the rho-like structures seen via dileptons. An independent evidence that one is in a confining mode is very welcome. Here we suggest a new tool how to distinguish free quarks from a confining mode. If we put the system into a finite box, then if the quarks are free one necessarily obtains a remarkable diffractive pattern in the propagator of a conserved current. This pattern is clearly seen in a lattice calculation in a finite box and it vanishes in the infinite volume limit as well as in the continuum. In contrast, the full QCD calculations in a finite box show the absence of the diffractive pattern implying that the quarks are confined.
