Euler-Heisenberg Lagrangian and Nonlinear QED phenomena

by Cesim Dumlu (ELI-NP)

Euler-Heisenberg (EH) Lagrangian encodes nonlinear, quantum corrections to
the Maxwell Lagrangian. It predicts the photon-photon scattering as well
as a set of nonlinear vacuum phenomena, analogous to the optical phenomena
seen in nonlinear/birefringent crystals. In this talk, I will briefly
mention the nonlinear aspects of the classical Maxwellian theory and
discuss the quantum corrections brought by (EH) Lagrangian and the related
observational prospects.