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A thin film lithium niobate near-infrared platform for multiplexing quantum nodes

Author

Listed:
  • Daniel Assumpcao

    (Harvard University)

  • Dylan Renaud

    (Harvard University)

  • Aida Baradari

    (Harvard University)

  • Beibei Zeng

    (AWS Center for Quantum Networking)

  • Chawina De-Eknamkul

    (AWS Center for Quantum Networking)

  • C. J. Xin

    (Harvard University)

  • Amirhassan Shams-Ansari

    (DRS Daylight Solutions)

  • David Barton

    (Harvard University)

  • Bartholomeus Machielse

    (AWS Center for Quantum Networking)

  • Marko Loncar

    (Harvard University)

Abstract

Practical quantum networks will require multi-qubit quantum nodes. This in turn will increase the complexity of the photonic circuits needed to control each qubit and require strategies to multiplex memories. Integrated photonics operating at visible to near-infrared (VNIR) wavelength range can provide solutions to these needs. In this work, we realize a VNIR thin-film lithium niobate (TFLN) integrated photonics platform with the key components to meet these requirements, including low-loss couplers ( 20 dB extinction), and high-bandwidth electro-optic modulators (>50 GHz). With these devices, we demonstrate high-efficiency and CW-compatible frequency shifting (>50% efficiency at 15 GHz), as well as simultaneous laser amplitude and frequency control. Finally, we highlight an architecture for multiplexing quantum memories and outline how this platform can enable a 2-order of magnitude improvement in entanglement rates over single memory nodes. Our results demonstrate that TFLN can meet the necessary performance and scalability benchmarks to enable large-scale quantum nodes.

Suggested Citation

  • Daniel Assumpcao & Dylan Renaud & Aida Baradari & Beibei Zeng & Chawina De-Eknamkul & C. J. Xin & Amirhassan Shams-Ansari & David Barton & Bartholomeus Machielse & Marko Loncar, 2024. "A thin film lithium niobate near-infrared platform for multiplexing quantum nodes," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-54541-2
    DOI: 10.1038/s41467-024-54541-2
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