Toward integrated photonic fusion gates for high-rate time-bin cluster state generation

POSTER

Abstract

Highly entangled photonic cluster states have emerged as an important resource for realizing numerous quantum technologies, including measurement-based quantum computing and loss-tolerant quantum networking. We design and fabricate an integrated photonic circuit composed of 2x2 3dB couplers, electro-optic switches, and delay lines on thin-film lithium niobate that can be used to manipulate time-bin photonic qubits. The circuit operates at telecommunication wavelengths, compatible with existing low-loss optical fiber networks. We measure and discuss the impact of important figures of merit for cluster state generation including insertion losses and switch extinction ratios.

*This work is supported by NSF QuIC-TAQS under award no. 2138068. 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. MY acknowledges support from the Department of Defense (DoD) through the National Defense Science and Engineering Graduate (NDSEG) Fellowship Program. DA acknowledges support by the National Science Foundation Graduate Research Fellowship under Grant No. DGE1745303. NS acknowledges support by the AQT Intelligent Quantum Networks and Technologies (INQNET) program.

Presenters

  • Matthew Yeh

    • Harvard University

Authors

  • Matthew Yeh

    • Harvard University

  • Daniel R Assumpcao

    • Harvard University

  • Evelyn L Hu

    • Harvard University

  • Neil Sinclair

    • Harvard University; California Institute of Technology
    • Harvard University

  • Marko Loncar

    • Harvard University
    • Harvard