标题： 手性无序与有限化学势下的QCD 显示英文标题

标题： Chiral Disorder and QCD at Finite Chemical Potential

摘要： 我们研究有限化学势$\mu$在QCD作为无序介质时的影响。 在冻结近似下，$A_4=i\mu$引入了一个复数电 Aharonov-Bohm 效应，导致夸克返回概率的对角项在$\mu=m_{\pi}/2$（介子质量的一半）处消失。 在两色QCD中，夸克返回概率的弱局域化贡献不受影响，导致光谱统计的变化。 在完整QCD中，复数电通量被屏蔽，轻夸克显示出不对称扩散，并且沿“空间”方向的电导率显著降低。 平均场论认为，在$1.5\rho_0<\rho<3\rho_0$范围内可能发生 d=1 的渗流相变，其中$\rho_0$是核物质密度。 显示英文摘要

摘要： We investigate the effects of a finite chemical potential $\mu$ in QCD viewed as a disordered medium. In the quenched approximation, $A_4=i\mu$ induces a complex electric Aharonov-Bohm effect that causes the diagonal contribution to the quark return probability to vanish at $\mu=m_{\pi}/2$ (half the pion mass). In two-color QCD, the weak-localization contribution to the quark return probability remains unaffected causing a mutation in the spectral statistics. In full QCD, the complex electric flux is screened and the light quarks are shown to diffuse asymmetrically with a substantial decrease in the conductivity along the `spatial' directions. Mean-field arguments suggest that a d=1 percolation transition may take place in the range $1.5\rho_0<\rho<3\rho_0$, where $\rho_0$ is nuclear matter density.