能量密度和功率通量的电磁势基础
Electromagnetic Potentials Basis for Energy Density and Power Flux
摘要：
很好地理解，在EM理论中，对于能量密度、动量传递、EM应力-能量张量等的定义，各种替代方案是可用的。尽管各种选项都与电动力学的基本方程兼容（例如，麦克斯韦方程、洛伦兹力定律、规范不变性），然而某些替代公式在应用于感兴趣的物理问题的透明度方面被认为比其他公式更可取。在这里，我们主张的透明度的基础上单独使用的EM潜力的选项。
英文摘要：
It is well understood that various alternatives are available within EM theory for the definitions of energy density, momentum transfer, EM stress-energy tensor, and so forth. Although the various options are all compatible with the basic equations of electrodynamics (e.g., Maxwell's equations, Lorentz force law, gauge invariance), nonetheless certain alternative formulations lend themselves to being seen as preferable to others with regard to the transparency of their application to physical problems of interest. Here we argue for the transparency of an option based on use of the EM potentials alone.
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