Bhadury Samapan, Florkowski Wojciech, Jaiswal Amaresh, Kumar Avdhesh, Ryblewski Radoslaw
School of Physical Sciences, National Institute of Science Education and Research, An OCC of Homi Bhabha National Institute, Jatni-752050, India.
Institute of Theoretical Physics, Jagiellonian University, ulica St. Łojasiewicza 11, 30-348 Krakow, Poland.
Phys Rev Lett. 2022 Nov 4;129(19):192301. doi: 10.1103/PhysRevLett.129.192301.
Starting from the kinetic theory description of massive spin-1/2 particles in the presence of a magnetic field, equations for relativistic dissipative nonresistive magnetohydrodynamics are obtained in the small polarization limit. We use a relaxation-time approximation for the collision kernel in the relativistic Boltzmann equation and calculate nonequilibrium corrections to the phase-space distribution function of spin-polarizable particles. We demonstrate that our framework naturally leads to emergence of the well-known Einstein-de Haas and Barnett effects. We obtain multiple transport coefficients and show, for the first time, that the coupling between spin and magnetic field appear at gradient order in the hydrodynamic equation.
从存在磁场时大质量自旋1/2粒子的动力学理论描述出发，在小极化极限下得到了相对论性耗散无电阻磁流体动力学方程。我们对相对论玻尔兹曼方程中的碰撞核采用弛豫时间近似，并计算了自旋可极化粒子相空间分布函数的非平衡修正。我们证明，我们的框架自然地导致了著名的爱因斯坦 - 德哈斯效应和巴尼特效应的出现。我们得到了多个输运系数，并首次表明自旋与磁场之间的耦合出现在流体动力学方程的梯度阶。
