Rapidly rotating pulsar radiation in vacuum nonlinear electrodynamics
  In this paper we investigate vacuum nonlinear electrodynamics corrections on rapidly rotating pulsar radiation and spin-down in the perturbative QED approach (post-Maxwellian approximation). An analytical expression for the pulsar's radiation intensity has been obtained and analyzed. 
V.I.Denisov and I.P.Denisova and A.B.Pimenov and V.A.Sokolov
astro-ph.HE