文档介绍：量子色动力学凝聚态物理-资料
量子色动力学
核力(强作用力)是自然界四种基本力之一 夸克和胶子构成核子，强作用力的基本粒子
量子色动力学: 强作用的基本理论
基本特征: 夸克禁闭 (没有自由的夸克和胶子)
(Collider at Brookhaven National Laboratory, The beams travel in opposite directions at nearly the speed of light before colliding. (Courtesy: Brookhaven National Laboratory)
致密星中的低温夸克物质
取自 F. Weber, astro-ph/007155
得到了超导态的重要尺度或能标-迈斯纳效应的穿透长度
使用了一种新方法计算了胶子和光子的混合模式( 类似于弱电统一理论中的光子-W/Z混合)
新光子在颜色-自旋耦合相中有质量→有电磁Meissner效应，(与以往的结论是不同的)
自旋为1的色超导体是第一类超导体
迈斯纳质量-色超导能标之二
S=0 配对
2-flavor SC (2SC)
Bailin, Love (1984)
Color-flavor-locking
(CFL)
Alford, Rajagopal,
Wilczek (1984)
S=1 配对
Polar phase
Schafer (2000)
Color-spin-locking
(CSL)
Bailin, Love (1984)
Schafer (2000)
Pair breaking?
不对称配对
rare case
real case
in cold dense quark matter
摘自黄梅的报告
ur
ug
ub
dg
dr
db
化学平衡和电中性色中性条件
摘自黄梅的报告
弱耦合近似下的能隙
Son (2019); Pisarski, Rischke (2000); Brown, Liu, Ren (2000);
Rischke, Wang (2019)
Depending on phases
Characteristic
of CSC
能隙(结果)
2SC
CFL
CSL
polar
spin
0
0
1
1
1
Two-gap structure breaks BCS-ratio
Exponential suppression factor in CSL from angular integral
(Zero temperature) (transition temperature)
Schmitt, Wang, Rischke, PRD(2019)
Mixing of gluon and photon in CSC
New electric charge and
8th color charge
New photon and gluon
New coupling constant
光子与胶子的迈斯纳质量
与弱电模型比较
计算方法
Nambu-Gorkov basis: Calculate polarization tensor
diagonalization
Rotated photon can penetrate into 2SC and CFL: no EM Meissner effect
Rotated photon in CSL phases has a non-vanishing mass: EM Meissner effect
Since , in weak couplings, spin-1 color-superconductor (CSL or polar phase) a type-I superconductor
迈斯纳质量：结果总结
Schmitt, QW, Rischke, PRL(2019)
色超导与电超导的比较
强耦合与弱耦合色超导
强耦合(BEC)情形
弱耦合(BCS)情形
BEC和BCS配对的差别
fermionic
bosonic
Eb
T dependence
EF dependence
T independent