论文标题
QED等离子体中巨大费物的旋转演变
Spin evolution of massive fermion in QED plasma
论文作者
论文摘要
通过量子动力学理论研究了局部平衡的无质量热QED等离子体中大量探针费物的动力学演变。我们考虑在培养基中进行2 by-2库仑散射的大规模探测器。轴向动力学方程是得出的，包括对梯度的第一阶和耦合的前对数顺序的碰撞项。碰撞项在全球平衡处消失，可以将放松时间作为操作员提取。我们将轴向动力学方程进一步分解为轴向齐射密度和横向磁偶极矩的动力学方程，并通过初步的数值分析说明了扩散和极化效应。
The dynamical evolution of spin of a massive probe fermion in a massless hot QED plasma at local equilibrium is investigated through the quantum kinetic theory. We consider the massive probe fermion undergoing 2-by-2 Coulomb scattering with the massless fermions in the medium. The axial kinetic equation is derived including the collision terms to the first order of gradients and leading logarithmic order of the coupling. The collision terms are vanishing at global equilibrium, around which the relaxation time can be extracted as an operator. We further decompose the axial kinetic equation into kinetic equations of axial-charge density as well as the transverse magnetic dipole moment, and illustrate the diffusion and polarization effect through preliminary numerical analysis.
