论文标题
在松弛时间近似中的相对论耗散旋转动力学
Relativistic dissipative spin dynamics in the relaxation time approximation
论文作者
论文摘要
Wigner函数的概念用于构建一个半古典动力学理论，该理论描述了在弛豫时间近似中自旋1/2颗粒的轴向电流相空间密度的演变。所得的方法可用于研究相对论问题，尤其是在重离子碰撞中的自旋偏振作用。还引入了基于自旋经典处理的轴向电流的表达，我们表明它与使用Wigner函数的早期计算一致。最后，我们为自旋张量提供了非平衡校正，这些校正量首次用于定义相对论物质中自旋传输系数的结构。
The concept of the Wigner function is used to construct a semi-classical kinetic theory describing the evolution of the axial-current phase-space density of spin-1/2 particles in the relaxation time approximation. The resulting approach can be used to study spin-polarization effects in relativistic matter, in particular, in heavy-ion collisions. An expression for the axial current based on the classical treatment of spin is also introduced and we show that it is consistent with earlier calculations using Wigner functions. Finally, we derive non-equilibrium corrections to the spin tensor, which are used to define, for the first time, the structure of spin transport coefficients in relativistic matter.
