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Paper detail

Continuous variable entanglement enhancement and manipulation by a sub-threshold type-II optical parametric amplifier

We experimentally demonstrate that the quantum entanglement between amplitude and phase quadratures of optical modes produced from a non-degenerate optical parametric amplifier (NOPA) can be enhanced and manipulated phase-sensitively by means of another NOPA. When both NOPAs operate at de-amplification, the entanglement degree is increased at the cavity resonance of the second NOPA. When the first NOPA operates at de-amplification and the second one at amplification, the spectral features of the correlation variances are significantly changed. The experimental results are in good agreement with the theoretical expectation.

preprint2010arXivOpen access
Yana ShangXiaojun JiaYumei ShenChangde XieKunchi Peng
quant-ph
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Yana ShangXiaojun JiaYumei ShenChangde XieKunchi Peng

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