Radiation-reaction force on a small charged body to second order
Radiation-reaction force on a small charged body to second order
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DOI：
10.1103/physrevd.97.105001
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发表时间：
2015-04
影响因子：
5
通讯作者：
Jordan Moxon;'. Flanagan
中科院分区：
文献类型：
--
作者：
Jordan Moxon;'. Flanagan
在经典电动力学中，加速的带电体发射辐射并经历相应的辐射反作用力或自力。我们将 Gralla、Harte 和 Wald 先前对平坦时空中电磁自力的严格推导扩展到总电荷的更高阶。 Gralla、Harte 和 Wald 提出的方法根据麦克斯韦场方程计算自力，并在物体的电荷、尺寸和质量趋于零的极限条件下计算应力能量守恒，并且不需要奇异自场的正则化。对于我们的高阶计算，有必要调整身体质量的定义，以避免包括来自遥远过去的身体产生的电磁场的自能。我们通过二阶推导了物体的质量、自旋和质心位置的演化方程。我们首次推导出自旋演化（自扭矩）的二阶加速度依赖性，以及扩展身体效应和对整体身体运动的加速度相关效应之间的混合。
In classical electrodynamics, an accelerating charged body emits radiation and experiences a corresponding radiation-reaction force, or self force. We extend to higher order in the total charge a previous rigorous derivation of the electromagnetic self force in flat spacetime by Gralla, Harte, and Wald. The method introduced by Gralla, Harte, and Wald computes the self force from the Maxwell field equations and conservation of stress-energy in a limit where the charge, size, and mass of the body go to zero, and does not require regularization of a singular self field. For our higher order computation, an adjustment of the definition of the mass of the body is necessary to avoid including self energy from the electromagnetic field sourced by the body in the distant past. We derive the evolution equations for the mass, spin, and center-of-mass position of the body through second order. We derive, for the first time, the second-order acceleration dependence of the evolution of the spin (self torque), as well as a mixing between the extended body effects and the acceleration dependent effects on the overall body motion.