发表机构
Purdue University（普渡大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究横向共动观测者测量振荡点电荷的电磁场，通过推迟场和四脚标架投影得到局部可观测量，区分辐射分类并解释非惯性系中静态电荷产生时变场。
AI 中文摘要
我们研究了由谐波振荡点电荷产生、并由经历相同运动的空间分离观测者测量的电磁场。我们在观测者的世界线上评估精确的推迟场，并将电磁场张量投影到观测者的局部正交四脚标架上。这种构造给出了作为观测者本征时间函数的电场、磁场、电磁能量密度和坡印廷矢量。我们的表述将无歧义的局部可观测量与将场分类为辐射的依赖于观测者的分类区分开来，并提供了一个具体场景来检验在非惯性坐标系中空间静止的电荷如何仍能产生随时间变化的局部测量场。
英文摘要
We investigate the electromagnetic field produced by a harmonically oscillating point charge and measured by a spatially separated observer undergoing the same motion. We evaluate the exact retarded field on the observer's worldline and project the electromagnetic field tensor onto the observer's local orthonormal tetrad. This construction yields the electric and magnetic fields, electromagnetic energy density, and Poynting vector measured as functions of the observer's proper time. Our formulation separates unambiguous local observables from the observer-dependent classification of a field as radiation and provides a concrete setting in which to examine how a charge that is spatially static in a non-inertial coordinate system can nevertheless produce time-dependent locally measured fields.
Comments20 pages, 2 figures
