M J Mallon et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 015501 doi:10.1088/0953-4075/41/1/015501
M J Mallon, M D Reid and M K Olsen
Show affiliationsBy calculating correlation spectra of the output fields, we show theoretically that two evanescently coupled χ(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.
42.50.Dv Quantum state engineering and measurements
42.65.Ky Frequency conversion; harmonic generation, including higher-order harmonic generation
Issue 1 (14 January 2008)
Received 11 September 2007, in final form 26 October 2007
Published 19 December 2007
M J Mallon et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 015501
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