Bright continuous-variable entanglement from the quantum optical dimer

Details Bright continuous-variable entanglement from the quantum optical dimer Bright continuous-variable entanglement from the quantum optical dimer

2007-09-11

arxiv.org/abs/0709.1533v1

Physics

Quantum Physics

19 pages, 13 figures, theoretical

Scientific paper

10.1088/0953-4075/41/1/015501

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.

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