Matteo Buzzegoli, Jonathan D. Kroth, Kirill Tuchin, Nandagopal Vijayakumar
We study the synchrotron radiation emitted by a rigidly rotating charged fermion in a constant magnetic field B parallel to the axis of rotation. The rigid rotation is classical and independent of the magnetic field. The angular velocity of rotation Ω is assumed to be much smaller than the inverse magnetic length qB−−−√ which allows us to ignore the boundary effects at r=1/Ω. We refer to such rotation as slow, even though in absolute value it may be an extremely rapid rotation. Using the exact solution of the Dirac equation we derived the intensity of electromagnetic radiation, its spectrum and chirality. We demonstrate by explicit numerical calculation that the effect of rotation on the radiation intensity increases with the particle energy. Depending on the relative orientation of the vectors Ω and B and the sign of the electric charge, the rotation can either strongly enhance or strongly suppress the radiation.
Comments: 5 pages, 2 figures
Tree-level entanglement in Quantum Electrodynamics: https://arxiv.org/abs/2209.01405
Samuel Fedida, Alessio Serafini
We report on a systematic study on the entanglement between helicity degrees of freedom generated at tree-level in quantum electrodynamics two-particle scattering processes. We determine the necessary and sufficient dynamical conditions for outgoing particles to be entangled with one another, and expose the hitherto unknown generation of maximal or nearly maximal entanglement through Bhabha and Compton scattering. Our work is an early step in revisiting quantum field theory and high-energy physics in the light of quantum information theory.
Comments: 12 pages, 21 figures