The process in which a photon splits into three after the collision with a free electron (triple Compton effect) is the most basic process for the generation of a high-energy multiparticle entangled state composed out of elementary quanta. The cross section of the process is evaluated in two experimentally realizable situations, one employing gamma photons and stationary electrons, and the other using keV photons and GeV electrons of an x-ray free electron laser. For the first case, our calculation is in agreement with the only available measurement of the differential cross section for the process under study. Our estimates indicate that the process should be readily measurable also in the second case. We quantify the polarization entanglement in the final state by a recently proposed multiparticle entanglement measure.



Keywords and Phrases

Compton Effect; Cross Section; Differential Cross Section; Final State; Free Electron; Gamma Photons; High Energy; Multiparticle Entangled State; Multiparticle Entanglement; Photon Splitting; Polarization Entanglement; X-ray Free Electron Lasers; Quantum Entanglement

International Standard Serial Number (ISSN)


Document Type

Article - Journal

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Final Version

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© 2012 American Physical Society (APS), All rights reserved.

Publication Date

01 Jun 2012

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Physics Commons