Toward practical generation of non-Gaussian states for time-domain-multiplexed optical quantum computer

Warit Asavanant; Akito Kawasaki; Shunya Konno; Ryuhoh Ide; Takumi Suzuki; Hector Brunel; Katsuki Nakashima; Takahiro Kashiwazaki; Asuka Inoue; Takeshi Umeki; Fumihiro China; Masahiro Yabuno; Shigehito Miki; Hirotaka Terai; Taichi Yamashima; Atsushi Sakaguchi; Rajveer Nehra; Kan Takase; Mamoru Endo; Akira Furusawa

doi:10.1117/12.3027231

4 October 2024 Toward practical generation of non-Gaussian states for time-domain-multiplexed optical quantum computer

Warit Asavanant, Akito Kawasaki, Shunya Konno, Ryuhoh Ide, Takumi Suzuki, Hector Brunel, Katsuki Nakashima, Takahiro Kashiwazaki, Asuka Inoue, Takeshi Umeki, Fumihiro China, Masahiro Yabuno, Shigehito Miki, Hirotaka Terai, Taichi Yamashima, Atsushi Sakaguchi, Rajveer Nehra, Kan Takase, Mamoru Endo, Akira Furusawa

Author Affiliations +

Proceedings Volume 13148, Quantum Communications and Quantum Imaging XXII; 1314807 (2024) https://doi.org/10.1117/12.3027231
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

Optical system is an appealing system for quantum computation as it has tremendous scalability over typical matter-based qubit. This is thanks to its rich degree of freedom that allows multiplexing. A particularly promising approach is the time-domain multiplexing approach where large-scale entangled resources and their usages have been demonstrated. To achieve quantum computation, these resources have to be combined with a type of states called non-Gaussian states. Non-Gaussian state generation requires strong nonlinearity which is challenging in optical system, compared to the matter-based system. In this work, we explain our recent work in the generation of the non-Gaussian states for optical quantum computer. In the first half, we discuss the demonstration of cat-breeding protocol for the generation of Gottesman-Kitaev-Preskill (GKP) qubit. In the second half, we show the demonstration of generation of cat states from broadband light source. In the future, by combining these two techniques, we can achieve high-rate high-quality GKP states crucial for optical quantum computer.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Warit Asavanant, Akito Kawasaki, Shunya Konno, Ryuhoh Ide, Takumi Suzuki, Hector Brunel, Katsuki Nakashima, Takahiro Kashiwazaki, Asuka Inoue, Takeshi Umeki, Fumihiro China, Masahiro Yabuno, Shigehito Miki, Hirotaka Terai, Taichi Yamashima, Atsushi Sakaguchi, Rajveer Nehra, Kan Takase, Mamoru Endo, and Akira Furusawa "Toward practical generation of non-Gaussian states for time-domain-multiplexed optical quantum computer", Proc. SPIE 13148, Quantum Communications and Quantum Imaging XXII, 1314807 (4 October 2024); https://doi.org/10.1117/12.3027231

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