A complete 3D numerical study of the effects of pseudoscalar–photon mixing on quasar polarizations Nishant Agarwal, PavanK. Aluri, Pankaj Jain, Udit Khanna and Prabhakar Tiwari Eur. Phys. J. C, 72 3 (2012) 1928 Published online: 20 March 2012 DOI: 10.1140/epjc/s10052-012-1928-y