Laser intensity effects in noncommutative QED

Abstract

We discuss a two-fold extension of QED assuming the presence of strong external fields provided by an ultra-intense laser and noncommutativity of spacetime. While noncommutative effects leave the electron's intensity induced mass shift unchanged, the photons change significantly in character: they acquire a quasi-momentum that is no longer light-like. We study the consequences of this combined noncommutative strong-field effect for basic lepton-photon interactions.

Comments: 5 pages, 1 figure. References added, typos corrected, bounds on noncommutativity scale added. Version to appear in PRD Rapid Communications