Angular momentum transfered by the field of a moving point charge
arXiv:2111.00321 · doi:10.1103/PhysRevA.105.023511
Abstract
The flux of angular momentum of electromagnetic field of an arbitrarily moving point charge is investigated. General equations are obtained for the transfer of angular momentum at arbitrary distance from the charge, and corresponding equations in the far-field approximation. An explicit expression is obtained for the flux of angular momentum in the wave zone in terms of coordinates, velocity, and acceleration of the charge. The torque is calculated, that would act on an object if it absorbed all the radiation incident on it. It is shown that this torque is proportional to the curl of the stress tensor of the electromagnetic field; in the far field approximation the torque is proportional to the curl of the Poynting vector.
arXiv comment18 pages, 6 figures
References in corpus (6)
- Higher order fluctuations and correlations of conserved charges from lattice QCD
- Detecting transition radiation from a magnetic moment
- Polarization radiation of vortex electrons with large orbital angular momentum
- Manipulating twisted electron beams
- On the Burgers vector of a wave dislocation
- Generation of hard twisted photons by charged particles in cholesteric liquid crystals