Two-node Quantum Network using Silicon-Vacancy Centers in a Diamond Nanophotonic Cavity

POSTER

Abstract

Silicon-vacancy (SiV) centers integrated into diamond nanophotonic crystal cavities provide efficient spin-photon interfaces and constitute a promising platform for quantum networking. Recently, spin-photon gates, memory-enhanced quantum communication, efficient single-photon generation, and high-fidelity gates between the SiV electron and the auxiliary 29Si nuclear spin have been demonstrated, all using a single quantum network node. In this work, we report on experimental realization of a quantum link connecting two SiV-based quantum nodes spatially separated by 20 meters. Using this system we realize optically mediated entanglement between 2 remote SiVs, observing the Bell-pair entanglement fidelity exceeding 0.74. Ongoing efforts towards extending these techniques to enable long-distance quantum communication will be discussed.

*This work was supported by the NSF, CUA, DOE, AFOSR, the NSF Center for Quantum Networks, and the AWS Center for Quantum Networking. Devices were fabricated in the Harvard University Center for Nanoscale Systems (CNS), a member of the NNCI, NSF award no. 1541959. YQH acknowledges support from the A*STAR NSS, and ENK and DA acknowledge support from the NSF GRFP. MS acknowledges funding from the NASA Space Technology Graduate Research Fellowship Program

Presenters

  • Yan-Cheng Wei

    • Harvard

Authors

  • Yan-Cheng Wei

    • Harvard

  • Can M Knaut

    • Harvard University

  • Yan Qi Huan

    • Harvard University

  • Pieter-Jan C Stas

    • Harvard University

  • Daniel R Assumpcao

    • Harvard University

  • Erik Knall

    • Harvard University

  • Aziza Suleymanzade

    • University of Chicago

  • Maddie Sutula

    • Harvard University

  • David Levonian

    • AWS CQN, Harvard University

  • Mihir K Bhaskar

    • AWS CQN, Harvard University

  • Denis D Sukachev

    • AWS CQN, Harvard University

  • Bartholomeus Machielse

    • AWS CQN, Harvard University

  • Hongkun Park

    • Harvard University

  • Marko Loncar

    • Harvard

  • Mikhail D Lukin

    • Harvard University