夸克禁闭与相变是强相互作用的基本特征，对于强作用物质理论与应用都具有特别 重要意义。本项目研究夸克物质性质与QCD相变机理及相关核物理前沿问题。我们发展了 增强型微扰QCD模型、多相输运模型，以及全息对偶方法，并应用于研究致密星结构和重 离子碰撞。我们发现，同时考虑夸克间的禁闭和微扰相互作用，或者考虑夸克质量的同 位旋相关性，可以使夸克物质的状态方程变硬，从而能够支撑约2倍太阳质量的奇异星， 与最新的天文观测数据一致。我们率先得到了夸克物质手征涡导率的高阶修正（从而刷 新了过去认为不存在高阶修正的看法），并自洽解释了磁催化和反磁催化效应，即在弱 耦合时BEC凝聚的临界温度随外磁场增强而升高，但在强耦合而电场较弱时会出现反磁催 化现象。利用锡核同位素的中子皮厚度数据以及一系列重核同位素对的结合能差的实验 数据，我们首次对交叉密度处对称能的大小和斜率给出了精确约束，并利用得到的对称 能在低密（亚饱和密度附近）时的行为对严格约束约束对称能的高密行为，同时将核物 质对称能概念推广到夸克物质。与习惯上认为的事件平面去相关性（即不依赖于赝快度 ）不同， 我们发现，前向和后向赝快度区域重建的第三阶事件平面是反关联的, 而且赝 快度较大时这种效应尤其明显。

Quark confinement and phase transition are fundamental feathers of the strong interaction, particularly important for understanding the properties of strongly interacting matter. The present project aims at investigating properties of quark matter, mechanism of QCD phase transition, and relevant frontier problems in nuclear physics. We have developed an enhanced perturbative QCD model, a multiphase transport model, and the AdS/CFT duration approach, and applied them to the investigation of compact-star structure and heavy-ion collisions. It is found that the inclusion of both confinement and perturbative interactions, or considering the isospin dependence of quark masses, stiffen the equation of quark matter, and accordingly support strange stars with the gravitational mass as large as two times the solar mass, consistent with the recent astronomical observations. In the first time we obtained the higher-order correction for the chiral vertical conductivity (updating the conventional view that the are no higher-order correction), and self-consistently explained the (inverse) magnetic catalysis effect, i.e. the critical BEC temperature increases with the magnetic strength at weak coupling while it decreases at strong coupling but a weak magnetic field. Taking advantage of the data for the neutron skin thickness of the Sn-isotopes and a series of binding energies of nuclear isotopes, we accurately get the magnitude and slope at the sub saturation cross density, then constrain the higher density behavior of the symmetry energy very strictly, and extend the symmetry energy concept for nuclear matter to that for quark matter simultaneously. Contrary to the conventional view of event-plan decorrelation, it is found that the third-order event plan constructed in forward and backward pseudorapidity is inversely correlated, and the correlation becomes stronger with a bigger pseudorapidity.