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Frontiers in Optics

Generation of One-Dimensional Cluster States enabling 25-GHz-Clock Quantum Computation

Takaya Hoshi, Konhi Ichii, Dohoon Lim, Takumi Suzuki, Akito Kawasaki, Ryuhoh Ide, A. Sakaguchi, Shota Yokoyama, Takahiro Kashiwazaki, Taichi Yamashima, Asuka Inoue, Takeshi Umeki, Warit Asavanant, Mamoru Endo, Akira Furusawa

Published Jan 1, 2025• 0 citations
Publisher

Abstract

We generate one-dimensional cluster states with temporal-mode durations of 40 ps across over one million qumodes, which enables high-speed and large-scale optical quantum computation.
DOI
10.1364/fio.2025.fth3c.4

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Enabling large-scale and high-speed quantum computation is a key to practical quantum computation. Continuous-variable approach in optical systems offer advantages in scalability and speed by leveraging their temporal degree of freedom and inherent large carrier frequency. In this paper, we investigate the generation and manipulation of quantum entanglement through a time-domain multiplexing approach. By employing time-domain multiplexing, we generate a two-dimensional cluster state—a universal resource for large-scale quantum computation—and perform quantum operations in the time domain with cluster state. Additionally, our ongoing research focuses on the generation and measurement of broadband optical quantum entanglement through an optical parametric oscillator, which holds potential as a foundation for high-speed quantum computing surpassing limitations of existing systems. By further engineering the quantum entanglement, we have also theoretically formulated a practical teleportation-based architectures for quantum computation in time domain. These advancements form the groundwork for the development of practical optical quantum computation.
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