Hybridization of pulse and continuous-wave based optical quantum computation
Abstract
We propose a pulse and continuous wave (CW) hybrid architecture of continuous-variable measurement-based optical quantum computation utilizing the strengths of both pulsed and CW light. In this architecture, input and ancillary non-Gaussian quantum states necessary for fault-tolerance and universality are generated with pulsed light, whereas quantum processors including continuous-variable cluster states and homodyne measurement systems are operated with CW light. This architecture is expected to enable both generation of quantum states with shorter optical wavepackets for ultrafast computation and low-loss manipulation and measurement of these states. In this study, as a proof-of-principle, an ultrafast homodyne measurement using a CW local oscillator was performed on single-photon states generated with pulsed light. The measured single-photon state's temporal width was around 70 ps and the value of the Wigner function at the origin was , which is highly non-classical. This will be a core technology for high-speed optical quantum information processing.
Cite
@article{arxiv.2512.00543,
title = {Hybridization of pulse and continuous-wave based optical quantum computation},
author = {Tatsuki Sonoyama and Tomoki Sano and Takumi Suzuki and Kazuma Takahashi and Takefumi Nomura and Akito Kawasaki and Takahiro Kashiwazaki and Asuka Inoue and Takeshi Umeki and Masahiro Yabuno and Shigehito Miki and Hirotaka Terai and Kan Takase and Warit Asavanant and Mamoru Endo and Akira Furusawa},
journal= {arXiv preprint arXiv:2512.00543},
year = {2026}
}