Shear viscosity of two-flavor inhomogenous color superconducting quark matter
Shear viscosity of two-flavor inhomogenous color superconducting quark matter
复制标题
双味非均质彩色超导夸克物质的剪切粘度
DOI：
10.1103/physrevd.96.094025
复制
发表时间：
2016
影响因子：
5
通讯作者：
Rishi Sharma
中科院分区：
文献类型：
--
作者：
S. Sarkar;Rishi Sharma
首次计算了双味平面波色超导夸克物质的剪切粘滞系数。这是致密夸克物质的结晶色超导相家族的一员，可能存在于中子星的核心中。FF相的成对夸克在动量空间的新月形阻塞区表面上具有无隙激发，并参与输运。我们计算了它们对剪切粘度的贡献。我们注意到，它们也导致了在2SC相中无阻尼的横t^1 $，t^2 $，t^3 $胶子的动态屏蔽。这些胶子的交换是成对夸克散射的最重要机制。我们发现，成对的夸克的剪切粘度大约是一个因素的100 $小的剪切粘度相比，未成对的夸克物质。我们的研究结果可能对快速旋转的冷中子星中r-模的阻尼有影响。
We present the first calculation of the shear viscosity for two-flavor plane wave (FF) color superconducting quark matter. This is a member of the family of crystalline color superconducting phases of dense quark matter that may be present in the cores of neutron stars. The paired quarks in the FF phase feature gapless excitations on surfaces of crescent shaped blocking regions in momentum space and participate in transport. We calculate their contribution to the shear viscosity. We note that they also lead to dynamic screening of transverse $t^1$, $t^2$, $t^3$ gluons which are undamped in the 2SC phase. The exchange of these gluons is the most important mechanism of the scattering of the paired quarks. We find that the shear viscosity of the paired quarks is roughly a factor of $100$ smaller compared to the shear viscosity of unpaired quark matter. Our results may have implications for the damping of $r-$modes in rapidly rotating, cold neutron stars.