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Storing single photons emitted by a quantum memory on a highly excited Rydberg state

Author

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  • Emanuele Distante

    (ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology)

  • Pau Farrera

    (ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology)

  • Auxiliadora Padrón-Brito

    (ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology)

  • David Paredes-Barato

    (ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology)

  • Georg Heinze

    (ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology)

  • Hugues de Riedmatten

    (ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology
    ICREA-Institució Catalana de Recerca i Estudis Avançats)

Abstract

Strong interaction between two single photons is a long standing and important goal in quantum photonics. This would enable a new regime of nonlinear optics and unlock several applications in quantum information science, including photonic quantum gates and deterministic Bell-state measurements. In the context of quantum networks, it would be important to achieve interactions between single photons from independent photon pairs storable in quantum memories. So far, most experiments showing nonlinearities at the single-photon level have used weak classical input light. Here we demonstrate the storage and retrieval of a paired single photon emitted by an ensemble quantum memory in a strongly nonlinear medium based on highly excited Rydberg atoms. We show that nonclassical correlations between the two photons persist after retrieval from the Rydberg ensemble. Our result is an important step towards deterministic photon–photon interactions, and may enable deterministic Bell-state measurements with multimode quantum memories.

Suggested Citation

  • Emanuele Distante & Pau Farrera & Auxiliadora Padrón-Brito & David Paredes-Barato & Georg Heinze & Hugues de Riedmatten, 2017. "Storing single photons emitted by a quantum memory on a highly excited Rydberg state," Nature Communications, Nature, vol. 8(1), pages 1-6, April.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms14072
    DOI: 10.1038/ncomms14072
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