自旋不是轨道角动量的相对论效应——与许方官和高春媛商榷

对《大学物理》2000年第11期上发表的《氢原子的磁矩－对自旋的讨论之一》一提出了不同的看法，认为该错把相对论的流密度当成了非相对论的流密度，前不能在非相对论近似下过滤到后，在相对论情况下，自旋和轨道耦合在一起，不能互相独立，在非相对论情况下自旋独立于轨道运动而存在；因而，自旋不是轨道角动量的相对论效应。

Spin is not the relativistic effect of orbital angular momentum——arguing with Xu Fang-guan and Gao Chun-yuan

Arguments are proposed to the paper of Xu Fang guan and Gao Chun yuan.The author argues that Xu and Gao mistake the relativistic current density as the non relativistic current density,but the relativistic current density cannot crossover to the non relativistic one at the non relativistic approximation.In the relativistic case spin and orbital angular momentum couple to each other,not able to exist independently.In the non relativistic case,however,spin exists independently on the orbital motion.Therefore,spin is not the relativistic effect of orbital angular momentum.