Bright continuous-variable entanglement from the quantum optical dimer

Abstract

We show theoretically that two evanescently coupled ${\chi }^{(2)}$ second harmonic generators inside a Fabry-Perot cavity provide a tunable source of quadrature squeezed light, Einstein-Podolsky-Rosen correlations and quantum entanglement. Unlike systems using coupled downconverters, second harmonic generation has no oscillation threshhold, so that the entangled fields become macroscopically occupied as soon as the pumping fields are turned on. This system also gives two frequencies at which the entangled fields can have macroscopic intensity. We show how the entanglement properties can be controlled by adjusting the pumping, the coupling strengths and the cavity detunings.

19 pages, 13 figures, theoretical

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Cited by in corpus (6)

• The Einstein-Podolsky-Rosen paradox: from concepts to applications
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• Entanglement and nonlocality in multi-particle systems
• Continuous-variable entanglement of two bright coherent states that never interacted
• Signifying the nonlocality of NOON states using Einstein-Podolsky-Rosen steering inequalities
• Minimum resources for versatile continuous variable entanglement in integrated nonlinear waveguides