The emission of a pair of entangled photons by an electron in an intense laser field can be described by two-photon transitions of laser-dressed, relativistic Dirac-Volkov states. In the limit of a small laser field intensity, the two-photon transition amplitude approaches the result predicted by double Compton scattering theory. Multiexchange processes with the laser field, including a large number of exchanged laser photons, cannot be described without the fully relativistic Dirac-Volkov propagator. The nonperturbative treatment significantly alters theoretical predictions for future experiments of this kind. We quantify the degree of polarization correlation of the photons in the final state by employing the well-established concurrence as a measure of the entanglement.
E. Lotstedt and U. D. Jentschura, "Nonperturbative Treatment of Double Compton Backscattering in Intense Laser Fields," Physical Review Letters, vol. 103, no. 11, pp. 110404-1 - 110404-4, American Physical Society (APS), Sep 2009.
The definitive version is available at https://doi.org/10.1103/PhysRevLett.103.110404
Keywords and Phrases
Compton Backscattering; Degree Of Polarization; Entangled Photons; Final State; Intense Laser Field; Laser Fields; Laser Photons; Nonperturbative Treatment; Theoretical Prediction; Two-photon Transitions; Volkov State; Laser Optics; Sound Reproduction; Laser Theory
International Standard Serial Number (ISSN)
Article - Journal
© 2009 American Physical Society (APS), All rights reserved.
01 Sep 2009