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Physical Review A

Output of multiphoton entangled states with cavity QED

Jie-Hui Huang, Shi-Yao Zhu

Published Sep 22, 2006• 8 citations
Publisher

Abstract

A scheme for the output of an Einstein-Podolsky-Rosen entangled photon pair is proposed in a cavity QED system composed of two high $Q$ cavities and a moving atom passing through them and with a final detection on the atomic ground states. The theoretical derivation shows that the production of multientangled photons can be achieved by passing the atom through additional cavities along the atom's path.

DOI
10.1103/physreva.74.032329

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A scheme for the output of an Einstein-Podolsky-Rosen entangled photon pair is proposed in a cavity QED system composed of two high QQQ cavities and a moving atom passing through them and with a final detection on the atomic ground states. The theoretical derivation shows that the production of multientangled photons can be achieved by passing the atom through additional cavities along the atom's path.
We propose a scheme to generate four-mode multiphoton entangled states by passing NNN identical atoms through two high-QQQ cavities in turn. In the case of N=1N=1N=1, the scheme can deterministically generate Einstein-Podosky-Rosen entangled photon pairs. We use adiabatical state evolution under large atom-cavity detuning, so the scheme is insensitive to atomic spontaneous decay. The influence of cavity decay on fidelity and success probability is also discussed.
We propose a scheme for the controlled generation of Einstein-Podosky-Rosen entangled photon pairs from an atom coupled to a high QQQ optical cavity, extending the prototype system as a source for deterministic single photons. A thorough theoretical analysis confirms the promising operating conditions of our scheme as afforded by currently available experimental setups. Our result demonstrates the cavity QED system as an efficient and effective source for entangled photon pairs, and shines new light on its important role in quantum information science.