https://doi.org/10.1140/epjp/s13360-023-03926-1
Regular Article
Phase effect on and symmetry of pair production in inhomogeneous electric fields with chirping
1
Key Laboratory of Beam Technology of the Ministry of Education, and College of Nuclear Science and Technology, Beijing Normal University, 100875, Beijing, China
2
College of Xinjiang Uyghur Medicine, 848000, Hotan, China
3
Institute of Radiation Technology, Beijing Academy of Science and Technology, 100875, Beijing, China
Received:
20
October
2022
Accepted:
24
February
2023
Published online:
5
April
2023
The effect of the carrier envelope phase on electron-positron pair production is studied in a spatially inhomogeneous electric field with symmetrical frequency chirp. In both high- and low-frequency fields, we find periodic variations in the momentum spectrum and in the reduced particle number induced by the phase. In particular, the changes are more sensitive in the case of a low-frequency field. Under certain conditions, the reduced particle number can increase by over one order of magnitude, induced by the phase. Some different types of symmetries for two correlated phases and an interesting individual self-symmetry are revealed in the momentum spectrum. The combined roles of phase and chirping in the periodic and symmetrical behaviour of the momentum spectrum and the reduced particle number provide a more flexible parameter choice to control and optimise the pair production.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
