Entanglement and the Einstein-Podolsky-Rosen paradox with coupled intracavity optical downconverters

Abstract

We show that two evanescently coupled ${\chi }^{(2)}$ parametric downconverters inside a Fabry-Perot cavity provide a tunable source of quadrature squeezed light, Einstein-Podolsky-Rosen correlations and quantum entanglement. Analysing the operation in the below threshold regime, we show how these properties can be controlled by adjusting the coupling strengths and the cavity detunings. As this can be implemented with integrated optics, it provides a possible route to rugged and stable EPR sources.

arXiv comment21 pages, 6 figures, submitted to PRA

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• Bright bichromatic entanglement and quantum dynamics of sum frequency generation
• Continuous-variable entanglement of two bright coherent states that never interacted
• Bright continuous-variable entanglement from the quantum optical dimer
• Object reconstruction from multiplexed quantum ghost images using reduction technique
• Coupled atomic-molecular condensates in a double-well potential: decaying molecular oscillations