We address the generation of fully inseparable three-mode entangled states of radiation by interlinked nonlinear interactions in χ<sup>(2)</sup> media. We show how three-mode entanglement can be used to realize symmetric and asymmetric telecloning machines, which achieve optimal fidelity for coherent states. An experimental implementation involving a single nonlinear crystal in which the two interactions take place simultaneously is suggested. Preliminary experimental results showing the feasibility and the effectiveness of the interaction scheme with a seeded crystal are also presented.
© 2004 Optical Society of America
Alessandro Ferraro, Matteo G. A. Paris, Maria Bondani, Alessia Allevi, Emiliano Puddu, and Alessandra Andreoni, "Three-mode entanglement by interlinked nonlinear interactions in optical χ(2) media," J. Opt. Soc. Am. B 21, 1241-1249 (2004)