Hannover 2010 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 66: Quantum Information: Photons and Nonclassical Light III

Q 66.6: Talk

Friday, March 12, 2010, 15:15–15:30, E 214

Three-color entanglement — Antonio Coelho¹, Felippe Barbosa¹, Katiuscia Cassemiro², •Alessandro Villar^2,3, Marcelo Martinelli¹, and Paulo Nussenzveig¹ — ¹Instituto de Física, Universidade de São Paulo, Post Office Box 66318, São Paulo, SP 05314-970, Brazil — ²Max Planck Institute for the Science of Light, Günther-Scharowsky-Strasse 1/Bau 24, 91058 Erlangen, Germany — ³University of Erlangen-Nuremberg, Staudtstrasse 7/B2, 91058 Erlangen, Germany

Entanglement is an essential quantum resource for the acceleration of information processing as well as for sophisticated quantum communication protocols. Quantum information networks are expected to convey information from one place to another by using entangled light beams. We demonstrated the generation of entanglement among three right beams of light, all of different wavelengths (532.251, 1062.102, and 1066.915 nanometers). We also observed disentanglement for finite channel losses, the continuous variable counterpart to entanglement sudden death.