研究者詳細 - 吉田　大輔

To implement quantum repeaters for long-distance quantum communications, frequency stabilization is necessary for coupling telecommunication wavelength photons with quantum memories that operate in the visible region. Here, a narrow-linewidth optical frequency comb for frequency stabilization is developed through phase-locking to an iodine-stabilized Nd:YAG laser using high-speed servo control. Subsequently, we phase lock a Pr3+:Y2SiO5 (Pr:YSO) quantum memory control laser to the developed optical frequency comb for linewidth transfer. The obtained linewidth (3.1 kHz) and frequency stability (1.84 x 10(-12) at an average time of 0.01 s) are sufficient for multimode storage in Pr:YSO quantum memory.

Coupling of a quantum memory and telecommunication wavelength photons for high-rate entanglement distribution in quantum repeaters

Mannami Kyoko, Kondo Takeshi, Tsuno Tomoki, Miyashita Takuto, Yoshida Daisuke, Ito Ko, Niizeki Kazu … 全著者表示

Optics Express 29 ( 25 ) 41522 - 41533 2021年12月 [査読有り]

DOI Web of Science CiNii Research

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Optical Society of America(OSA) 共著

Quantum repeaters are indispensable tools for long-distance quantum communication. However, frequency matching between entangled photon sources and remote quantum memories (QMs) is difficult, which is an obstacle to the implementation of quantum repeaters. In this paper, we demonstrate a method to achieve the coupling of a Pr:YSO as a fixed-time QM with a single telecommunication-wavelength photon through frequency stabilization using an optical frequency comb over all applied laser wavelengths. The demonstrated method can lead to the implementation of a quantum repeater scheme enabling an improvement of the entanglement generation rate, paving the way for long-distance quantum communication. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Two-photon comb with wavelength conversion and 20-km distribution for quantum communication

Niizeki, K; Yoshida, D; Ito, K; Nakamura, I; Takei, N; Okamura, K; Zheng, MY; Xie, XP; Horikiri, T

COMMUNICATIONS PHYSICS 3 ( 1 ) 2020年8月 [査読有り]

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Entanglement distribution between quantum repeater nodes with an absorptive type memory

Yoshida, D; Niizeki, K; Tamura, S; Horikiri, T

INTERNATIONAL JOURNAL OF QUANTUM INFORMATION 18 ( 5 ) 2020年8月 [査読有り]

DOI Web of Science

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）共著

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論文 - 吉田 大輔

<吉田　大輔>

論文 - 吉田　大輔