Towards quantum communication and entanglement distribution using solid-state defects integrated into a diamond nanophotonic system

POSTER

Abstract

Silicon vacancy (SiV) centers integrated into diamond nanophotonic crystal cavities provide a high-efficiency spin-photon interface, strong spin-photon interaction, and access to auxiliary memory qubits. This platform recently has demonstrated memory enhanced quantum communication, efficient generation of shaped single photons, and high-fidelity gates between the SiV electron and the auxiliary 29Si nuclear spin, all using a single quantum network node. In this work, I will report on progress towards realizing a quantum link constituted by two SiV-based quantum nodes spatially separated by 20 meters and connected via optical fiber. Specifically, I will discuss methods of entanglement distribution, entanglement purification, and progress towards realizing a full quantum-repeater architecture.

*This work was supported by the NSF (PHY-2012023), NSF EFRI ACQUIRE (5710004174), CUA (PHY-1734011), DoE (DE-SC0020115), AFOSR MURI (FA9550171002 and FA95501610323), and CQN (EEC-1941583). Devices were fabricated in the Harvard University Center for Nanoscale Systems (CNS), a member of the National Nanotechnology Coordinated Infrastructure Network (NNCI), which is supported by the National Science Foundation under NSF award no. 1541959. ENK, and DA acknowledge that this material is based upon work supported by the National Science Foundation Graduate Research Fellowship under Grant No. DGE1745303. YQH acknowledges support from the Agency for Science, Technology and Research (A*STAR) Singapore through the National Science Scholarship.

Presenters

  • Can M Knaut

    • Harvard University

Authors

  • Can M Knaut

    • Harvard University

  • Daniel Assumpcao

    • Harvard University

  • Aziza Suleymanzade

    • University of Chicago
    • Harvard University

  • Yan-Cheng Wei

    • Harvard University

  • Erik Knall

    • Harvard University

  • Pieter-Jan C Stas

    • Harvard University

  • Yan Qi Huan

    • Harvard University

  • Bartholomeus Machielse

    • Harvard University

  • Denis D Sukachev

    • Harvard University

  • Mihir K Bhaskar

    • Harvard University

  • David Levonian

    • Harvard University

  • Hongkun Park

    • Harvard University

  • Marko Loncar

    • Harvard University
    • Harvard

  • Mikhail Lukin

    • Harvard University