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Effect of the dynamical collision frequency on quantum wakefields
Author(s) -
Moldabekov Zh.A.,
Amirov S.M.,
Ludwig P.,
Bonitz M.,
Ramazanov T.S.
Publication year - 2019
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201800161
Subject(s) - collision , physics , collision frequency , ion , supersonic speed , quantum , plasma , work (physics) , fermi gamma ray space telescope , atomic physics , electron , relative velocity , computational physics , quantum mechanics , mechanics , computer science , computer security
Previous papers on the quantum wakefield around an ion moving in a dense plasma have considered the collision frequency in the static approximation. In this work, we present the results of the dynamically screened ion potential taking into account the dynamical electron–ion collision frequency. The Lenard–Balescu dynamical collision frequency and various approximations to it are considered. As a main result of our investigation for the subsonic, sonic, and supersonic regimes, we find that the frequency dependence of collisions can be safely discarded if the electronic streaming velocity (relative to an ion) is comparable to or less than the electronic Fermi velocity.