Abstract

The deterministic generation of collimated single and entangled photons is of crucial importance in several applications in Quantum Information. Most of the methods require the use of high-Q cavities, something which is very demanding in practice. In this work we propose a new method to produce single- and entangled-photons in a deterministic way which does not require the use of cavities. It relies on the collective light emission in some particular directions as a consequence of the presence of entanglement in an atomic ensemble. This light emission is triggered by a laser pulse, and therefore our scheme is deterministic. Furthermore, it allows one to produce a variety of photonic entangled states by first preparing certain classes of atomic entangled states.

© 2007 IEEE