We study photon number distribution for Yuen's two-photon coherent state. We find a multi-photon interference effect will cancel either the two-photon or the three-photon terms. Such a modified coherent state can be used for improving the security of quantum cryptography and for creating a three-photon entangled state.
© 2004 Optical Society of America
(030.0030) Coherence and statistical optics : Coherence and statistical optics
(030.1640) Coherence and statistical optics : Coherence
(270.0270) Quantum optics : Quantum optics
(270.5290) Quantum optics : Photon statistics
Z. Y. Ou, "Modified coherent state for improvement of quantum cryptography and generation of 3-photon entangled state," in Frontiers in Optics 2004/Laser Science XXII/Diffractive Optics and Micro-Optics/Optical Fabrication and Testing, OSA Technical Digest Series (Optical Society of America, 2004), paper FMO4.
References are not available for this paper.