Experimental generation of 6 dB continuous variable entanglement from a nondegenerate optical parametric amplifier

Details Experimental generation of 6 dB continuous variable entanglement from a nondegenerate optical parametric amplifier Experimental generation of 6 dB continuous variable entanglement from a nondegenerate optical parametric amplifier

2010-03-12

arxiv.org/abs/1003.2460v1

Optics Express, 18, 6149 (2010)

Physics

Quantum Physics

7 pages, 5 figures

Scientific paper

We experimentally demonstrated that the quantum correlations of amplitude and phase quadratures between signal and idler beams produced from a non-degenerate optical parametric amplifier (NOPA) can be significantly improved by using a mode cleaner in the pump field and reducing the phase fluctuations in phase locking systems. Based on the two technical improvements the quantum entanglement measured with a two-mode homodyne detector is enhanced from ~ 4 dB to ~ 6 dB below the quantum noise limit using the same NOPA and nonlinear crystal.

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