https://doi.org/10.1051/epjconf/201920410008
Dynamics of an orbital polarization of twisted electron beams in electric and magnetic fields
1 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2 Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna 141980, Russia
3 Research Institute for Nuclear Problems, Belarusian State University, Minsk 220030, Belarus
4 University of Chinese Academy of Sciences, Yuquanlu 19A, Beijing 100049, China
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Published online: 3 April 2019
Abstract
Relativistic classical and quantum dynamics of twisted (vortex) Dirac particles in arbitrary electric and magnetic fields is constructed. The relativistic Hamiltonian and equations of motion in the Foldy-Wouthuysen representation are derived. Methods for the extraction of an electron vortex beam with a given orbital polarization and for the manipulation of such a beam are developed. The new effect of a radiative orbital polarization of a twisted electron beam in a magnetic field resulting in a nonzero average projection of the intrinsic orbital angular momentum on the field direction is predicted.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
