Heralded generation of entanglement with coupled cavities

Jaeyoon Cho, Dimitris G. Angelakis, Sougato Bose

Published 2007-12-14, updated 2008-08-15Version 2

We propose a scheme to generate two-photon, two-atom, or atom-photon entangledstates with a coupled system of two cavities. In our scheme, two cavity photonsare exchanged by the direct inter-cavity coupling, while atoms in the cavitiessimply play the role of generating and probing them. By virtue of the highefficiency of atomic state measurement, this method enables the realization ofefficient heralded entanglement generation robust against photon loss, whichgreatly facilitates applications in quantum information processing.