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Author Mahajan, S.M.; Asenjo, F.A.
Title Interacting quantum and classical waves: Resonant and non-resonant energy transfer to electrons immersed in an intense electromagnetic wave Type
Year 2022 Publication Physics Of Plasmas Abbreviated Journal Phys. Plasmas
Volume 29 Issue 2 Pages 022107
Keywords KLEIN-GORDON; DIRAC EQUATIONS; FIELD; PARTICLE; ACCELERATION
Abstract Dynamics of electrons subjected to a constant amplitude classical electromagnetic (EM) wave is investigated as a fundamental, representative problem in the physics of interacting quantum and classical waves. In the nonrelativistic regime (electrons as Schrodinger waves), the electron energy acquires a constant and a time dependent part. Driven by EM waves, both parts scale strongly with the amplitude, but we expect no resonant enhancement since the parallel electron “speed ” of nonrelativistic electrons could never match the wave phase velocity. In the relativistic regime (electron as a Klein-Gordon wave), however, a class of electron waves (with parallel speed matching the EM phase speed) are resonantly excited to extremely high energies. Such a direct resonant energy transfer from intense electromagnetic waves constitutes a mechanism that could, in principle, power the most energetic of cosmic rays (this mechanism will work on protons just as well). Some predictions of the theory will, hopefully, be tested in laboratory laser experiments. The nonrelativistic calculations will also be examined in the context of recent experiments using photon-induced near-field electron microscopy in detail.
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Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition (down)
ISSN 1070-664X ISBN Medium
Area Expedition Conference
Notes WOS:000760744200001 Approved
Call Number UAI @ alexi.delcanto @ Serial 1540
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Author Mahajan, S.M.; Asenjo, F.A.
Title Parametric amplification of electromagnetic plasma waves in resonance with a dispersive background gravitational wave Type
Year 2023 Publication Physical Review E Abbreviated Journal Phys. Rev. E
Volume 107 Issue 3 Pages 035205
Keywords ACCELERATION; RADIATION; INSTABILITIES; EXCITATION; PARTICLES; LIGHT
Abstract It is shown that a subluminal electromagnetic plasma wave, propagating in phase with a background subluminal gravitational wave in a dispersive medium, can undergo parametric amplification. For these phenomena to occur, the dispersive characteristics of the two waves must properly match. The response frequencies of the two waves (medium dependent) must lie within a definite and restrictive range. The combined dynamics is represented by a Whitaker-Hill equation, the quintessential model for parametric instabilities. The exponential growth of the electromagnetic wave is displayed at the resonance; the plasma wave grows at the expense of the background gravitational wave. Different physical scenarios, where the phenomenon can be possible, are discussed.
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Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition (down)
ISSN 2470-0045 ISBN Medium
Area Expedition Conference
Notes WOS:000957776100002 Approved
Call Number UAI @ alexi.delcanto @ Serial 1766
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