Stimulated emission from particles crossing the interface between two media

Zaretskiĭ, L F; Lomonosov, V. V.; Nersesov, E. A.

doi:10.1070/qe1980v010n11abeh010317

Cited by 3 publications

(2 citation statements)

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“…As the example of stimulated radiation produced by a wave packet, we consider transition radiation from the Dirac fermion traversing a mirror in the field of a laser wave. Spontaneous radiation created by the wave packet of a Dirac fermion falling onto the conducting plate was thoroughly investigated in [22] (see also [28,29,34,[44][45][46]). In that paper, it was assumed that the mirror is ideally conducting and it is placed at z 0.…”

Section: Stimulated Radiation From a Wave Packetmentioning

confidence: 99%

“…For definiteness, we consider stimulated transition radiation from a Dirac particle wave packet crossing an ideally conducting plate irradiated by a laser wave. Note that stimulated transition radiation was also studied in [28,29] where the profiles of particle wave packets and the disconnected contributions to the S-matrix were not taken into account. In this section, we derive the explicit expression for the radiation intensity and show that this process can be employed for imaging the profile of an electron wave function by using the developed methods of noninvasive diagnostics of beams of charged particles.…”

Section: Introductionmentioning

confidence: 99%

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Coherent radiation of photons by particle wave packets

Kazinski

2022

Eur. Phys. J. C

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The radiation of photons by electrons is investigated in the framework of quantum electrodynamics up to the second order in the coupling constant e. The N-particle, coherent, and thermal initial states are considered and the forms of the electron wave packets are taken into account. The explicit expressions for the intensity of radiation and the inclusive probability to record a photon are obtained. It is found that there are three processes in this order of perturbation theory where the electron wave packet radiates coherently and can be regarded as a charged fluid even on integrating over the final states of the electron, i.e., in considering the inclusive probabilities and intensity of radiation. These processes are stimulated radiation by an electron, coherent radiation from a beam of particles, and reradiation of a photon in the Compton process. We obtain the explicit expressions for the intensity of radiation and the inclusive probability to record a photon for these processes. As particular cases, we consider: stimulated transition radiation produced by an electron wave packet traversing a mirror and backlighted by a laser wave, reradiation of photons in a coherent state by an electron wave packet. In the latter case, we deduce that the wave packet of a single electron can be endowed with the susceptibility tensor and this tensor has the same form as for an electron plasma in the small recoil limit.

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