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

Yu Wang; Heng Shen; Xiaoli Jin; Xiaolong Su; Changde Xie; Kunchi Peng

doi:10.1364/OE.18.006149

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

Quantum Physics 2015-05-18 v1

Authors: Yu Wang , Heng Shen , Xiaoli Jin , Xiaolong Su , Changde Xie , Kunchi Peng

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Abstract

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.

Keywords

continuous variable entanglement nondegenerate optical parametric amplifier quantum noise homodyne detection mode cleaner phase locking

Cite

@article{arxiv.1003.2460,
  title  = {Experimental generation of 6 dB continuous variable entanglement from a nondegenerate optical parametric amplifier},
  author = {Yu Wang and Heng Shen and Xiaoli Jin and Xiaolong Su and Changde Xie and Kunchi Peng},
  journal= {arXiv preprint arXiv:1003.2460},
  year   = {2015}
}

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7 pages, 5 figures

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

Abstract

Keywords

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