Spin-polarization effects in cherenkov radiation from electrons

verfasst von: A. A. Peshkov
Abstract: A quantum electrodynamical theory of Cherenkov radiation emitted by spin-polarized electrons moving in an isotropic medium is developed within the density matrix framework. Special attention is paid to the polarization properties of the emitted photons described by means of Stokes parameters. It is demonstrated that, although the Cherenkov radiation is primarily linearly polarized in the plane containing the direction of observation and the path of the electrons, the photons may have a small component of circular polarization of the order of 3 × 10⁻⁶ for electron kinetic energy of 500 keV due to the initial electron spin polarization, whose existence can be confirmed by sensitive measurements in the future.
Externe Organisation(en): Technische Universität Braunschweig
Physikalisch-Technische Bundesanstalt (PTB)
Typ: Artikel
Journal: Canadian journal of physics
Band: 98
Seiten: 660-663
Anzahl der Seiten: 4
ISSN: 0008-4204
Publikationsdatum: 07.2020
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Physik und Astronomie (insg.)
Elektronische Version(en): https://doi.org/10.1139/cjp-2019-0441 (Zugang: Geschlossen)

BibTeX

@article{472e15fa3aad41d5b2259ed1b208acbc,
title = "Spin-polarization effects in cherenkov radiation from electrons",
abstract = "A quantum electrodynamical theory of Cherenkov radiation emitted by spin-polarized electrons moving in an isotropic medium is developed within the density matrix framework. Special attention is paid to the polarization properties of the emitted photons described by means of Stokes parameters. It is demonstrated that, although the Cherenkov radiation is primarily linearly polarized in the plane containing the direction of observation and the path of the electrons, the photons may have a small component of circular polarization of the order of 3 × 10−6 for electron kinetic energy of 500 keV due to the initial electron spin polarization, whose existence can be confirmed by sensitive measurements in the future.",
keywords = "Cherenkov radiation, Photon polarization, Polarized beam diagnostics, Quantum electrodynamics, Spin polarization",
author = "Peshkov, {A. A.}",
note = "Funding information: The author is indebted to S.N. Galyamin for fruitful discussions. This research was funded by the Deutsche Forschungsgemein-schaft (DFG, German Research Foundation) under Germany{\textquoteright}s Excellence Strategy — EXC-2123 QuantumFrontiers — 390837967.",
year = "2020",
month = jul,
doi = "10.1139/cjp-2019-0441",
language = "English",
volume = "98",
pages = "660--663",
journal = "Canadian journal of physics",
issn = "0008-4204",
publisher = "National Research Council of Canada",
number = "7",
}