Bending of electromagnetic wave in an ultra-strong magnetic field

We consider the bending of light by nonlinear electrodynamics when the magnetic field B exceeds the critical value Bc = m2c2/e h-bar = 4.4 × 109T. Using the index of refraction derived from the analytic series representation in one-loop effective action of QED, we found the trajectory and the bending angle of light in geometric optics. The angle bent by ultra-strong magnetic field of magnetar was estimated and compared with the gravitational bending. The result may be useful in studying the lensing, birefringence, and other nonlinear quantum electrodynamic effects above Bc