Towards telecommunication-band quantum networking for atom arrays

ORAL

Abstract

Neutral atom arrays are a powerful platform for quantum computation and simulation. Extending their connectivity via remote entanglement is a key requirement for quantum networking applications such as distributed computation, non-local sensing, and quantum key distribution. Furthermore, operating in the telecommunication C-band is essential for realizing low-loss, long-distance entanglement between spatially separated atomic nodes.

In this talk, I will present progress toward quantum networking with individually trapped 87Rb atoms using an intrinsic atomic interface at 1530 nm based on the 5P3/2 ↔ 4D5/2 transition. This is realized in a novel cavity QED architecture based on high-finesse Fabry-Perot microcavities. The cavities are fabricated using scalable silicon nanolithography techniques and are optimized for photon collection efficiency, with predicted single-atom cooperativities exceeding 200. We further demonstrate coherent control of atomic stretched states, establishing essential ingredients for fast, high-fidelity spin-photon entanglement.

These results outline a path toward metropolitan-scale entanglement distribution. More broadly, they demonstrate the potential for integrating neutral atom arrays with silicon nanophotonic platforms for multiplexing and on-chip entanglement routing.

*This work is supported by DARPA HR011-24-9-0359, DOE DE-AC02-05CH11231, NSF OMA-2120757, ARO W911NF2320219, the Center for Ultracold Atoms (an NSF Frontier Center), QuEra Computing A57912, and NSF NQVL.

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Presenters

  • Andrei Ruskuc

    • Harvard University
    • Department of Physics, Harvard University

Authors

  • Andrei Ruskuc

    • Harvard University
    • Department of Physics, Harvard University

  • Matthew Bilotta

    • Harvard University
    • Department of Physics, Harvard University

  • Eirini Mandopoulou

    • Harvard University

  • Brandon Grinkemeyer

    • Harvard University
    • Department of Physics, Harvard University

  • Danilo Shchepanovich

    • Harvard University
    • Department of Physics, Harvard University

  • Shivam Mundhra

    • Harvard University
    • Department of Physics, Harvard University

  • Offek Tziperman

    • harvard university
    • Department of Physics, Harvard University
    • Harvard University

  • Michel Tao

    • Harvard University
    • Harvard Unidersity

  • Sophie Ding

    • Harvard University
    • Harvard John A. Paulson School of Engineering and Applied Sciences

  • Shankar G Menon

    • Harvard University
    • Department of Physics, Harvard University

  • Marko Loncar

    • Harvard University

  • Kiyoul Yang

    • Harvard University

  • Vladan Vuletić

    • Massachusetts Institute of Technology
    • Department of Physics and Research Laboratory of Electronics, MIT
    • MIT

  • Mikhail D Lukin

    • Harvard University
    • Department of Physics, Harvard University