Spontaneous emission and teleportation in cavity QED
  In this work, we consider atomic spontaneous emission in a system consisting of two identical two-level atoms interacting dispersively with the quantized electromagnetic field in a high-Q cavity. We investigate the destructive effect of the atomic decay on the generation of maximally entangled states, following the proposal by Zheng S B and Guo G C (2000 Phys. Rev. Lett. 85 2392). In particular, we analyze the fidelity of teleportation performed using such a noisy channel and calculatethe maximum spontaneous decay rate we may have in order to realize teleportation. 
P.P. Munhoz, J.A. Roversi, A. Vidiella-Barranco, F. L. Semiao   (Universidade Estadual de Campinas, Brazil)