Polarization-Frequency Entangled Narrowband Photon Pairs

ORAL

Abstract

We demonstrate a robust scheme to produce narrowband biphotons with polarization-frequency-coupled entanglement from spontaneous four-wave mixing (SFWM) in laser cooled atoms with a right-angle geometry. Making use of an acousto-optic modulator and polarization-dependent two-photon interference, we create a coupled hyperentanglement between the polarization and frequency domains from unentangled SFWM photon pairs. We further demonstrate that, making use of the coupling effect, we can transfer the phase of a complex polarizer into the frequency entanglement and create a tunable two-mode frequency entangled Bell state.

*The work was supported by the Hong Kong RGC (Project No. 16301214). Chi Shu acknowledges support from the Undergraduate Research Opportunities Programat (UROP) at the Hong Kong University of Science and Technology.

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Authors

  • Chi Shu

    • Hong Kong University of Science and Technology

  • Xianxin Guo

    • the Hong Kong University of Science and Technology
    • Hong Kong University of Science and Technology

  • Peng Chen

    • the Hong Kong University of Science and Technology
    • Hong Kong University of Science and Technology

  • M.M.T. Loy

    • the Hong Kong University of Science and Technology
    • Department of Physics, Hong Kong University of Science and Technology
    • Hong Kong University of Science and Technology

  • Shengwang Du

    • the Hong Kong University of Science and Technology
    • Department of Physics, Hong Kong University of Science and Technology
    • Hong Kong University of Science and Technology