Lorentz力矩及其张量特性

Lorentz Torque and Its Specific Tensor Property

用对偶变换求出了运动电磁偶极子承受的Lorentz力矩 ,它不仅包括电场与电矩和磁场与磁矩耦合的本征力矩 ,还包括磁场与电矩和电场与磁矩耦合的交叉力矩.该力矩的协变形式是二阶反对称张量 ,其变换性质与非张量方法和Trouton -Noble零实验的结果完全相符.

The Lorentz torque on electric-magnetic system was derived by dual transformation.It includes not only the proper coupling torque from electric field——dipole moment and magnetic field——magnetic moment,but the cross coupling torque from electric field——magnetic moment and magnetic field——electric dipole moment.The Lorentz torque 3-vector be expanded to an antisymmetric 4-tensor and its transformation consistens with the results of Trouton-Noble null-experiment entirely.