Direct production of tripartite pump-signal-idler entanglement in the above-threshold optical parametric oscillator |
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Authors: | Villar A S Martinelli M Fabre C Nussenzveig P |
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Institution: | Instituto de Física, Universidade de S?o Paulo, Caixa Postal 66318, 05315-970 S?o Paulo, SP, Brazil. |
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Abstract: | We calculate the quantum correlations existing among the three output fields (pump, signal, and idler) of a triply resonant nondegenerate optical parametric oscillator operating above threshold. By applying the standard criteria P. van Loock and A. Furusawa, Phys. Rev. A 67, 052315 (2003)], we show that strong tripartite continuous-variable entanglement is present in this well-known and simple system. Furthermore, since the entanglement is generated directly from a nonlinear process, the three entangled fields can have very different frequencies, opening the way for multicolored quantum information networks. |
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