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Enhancing a slow and weak optomechanical nonlinearity with delayed quantum feedback

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  • Zhaoyou Wang

    (and Ginzton Laboratory, Stanford University)

  • Amir H. Safavi-Naeini

    (and Ginzton Laboratory, Stanford University)

Abstract

A central goal of quantum optics is to generate large interactions between single photons so that one photon can strongly modify the state of another one. In cavity optomechanics, photons interact with the motional degrees of freedom of an optical resonator, for example, by imparting radiation pressure forces on a movable mirror or sensing minute fluctuations in the position of the mirror. Here, we show that the optical nonlinearity arising from these effects, typically too small to operate on single photons, can be sufficiently enhanced with feedback to generate large interactions between single photons. We propose a protocol that allows photons propagating in a waveguide to interact with each other through multiple bounces off an optomechanical system. The protocol is analysed by evolving the full many-body quantum state of the waveguide-coupled system, illustrating that large photon–photon interactions mediated by mechanical motion may be within experimental reach.

Suggested Citation

  • Zhaoyou Wang & Amir H. Safavi-Naeini, 2017. "Enhancing a slow and weak optomechanical nonlinearity with delayed quantum feedback," Nature Communications, Nature, vol. 8(1), pages 1-9, August.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15886
    DOI: 10.1038/ncomms15886
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