2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/41435It is demonstrated that the nonlinear, and as yet unobserved, QED effect of slowing down light by application of a strong magnetic field may be observable with large laser interferometers like for instance LIGO or GEO600.4 pages, no figures, revtex, uses slashbox.styHigh Energy Physics - Phenomenologytext