Atom-photon, atom-atom and photon-photon entanglement preparation via   fractional adiabatic passage
  We propose a relatively robust scheme to generate maximally entangled states of (i) an atom and a cavity photon, (ii) two atoms in their ground states, and (iii) two photons in two spatially separate high-Q cavities. It is based on the interaction via fractional adiabatic passage of a three-level atom traveling through a cavity mode and a laser beam. The presence of optical phases is emphasized. 
M. Amniat-Talab, S. Guerin, N. Sangouard and H. R. Jauslin