Maximal atom-photon entanglement by the incoherent pumping fields Behzad Sangshekan, Nayyere Einali Saghavaz, Ali Hamrah Gharamaleki and Mostafa Sahrai Eur. Phys. J. Plus, 134 6 (2019) 274 Published online: 20 June 2019 DOI: 10.1140/epjp/i2019-12577-2