Storage and release of optical quantum entangled states using concatenated cavity system
Project/Area Number |
18H01149
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 13020:Semiconductors, optical properties of condensed matter and atomic physics-related
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Research Institution | The University of Tokyo |
Principal Investigator |
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Project Period (FY) |
2018-04-01 – 2021-03-31
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Project Status |
Completed (Fiscal Year 2020)
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Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2020: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2018: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
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Keywords | 量子エンタングルメント / 光子 / 量子メモリー / 光パラメトリック発振器 / 量子光学 |
Outline of Final Research Achievements |
We extend quantum memories composed of concatenated optical cavities, which are our original technique. We create and store a single photon straddling between two memory systems as an entangled state, and release it with controlled timings. We estimate the released quantum state and verify that they are controlled while keeping unique features of quantum mechanics. In particular, negative regions of the Wigner functions are important, distinguishing quantum mechanics from classical mechanics, and the important thing is that the quantum states are stored while keeping this negative regions.
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Academic Significance and Societal Importance of the Research Achievements |
量子力学の応用としての量子コンピューターが注目を集める中で、光という量子系の可能性を広げる意味で、光の特殊な量子状態のタイミング制御を行うという重要な研究に成功した。単なる光子のタイミング制御ではなく、光の位相に敏感な量子状態を扱い、複数台の光共振器メモリーを位相同期できている点が重要である。これは、時間領域多重された光波束の巨大エンタングルメントと組み合わせることで、原理的にはユニバーサルな量子コンピューターの実現につながるものである。
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Report
(4 results)
Research Products
(14 results)
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[Journal Article] Optical quantum information processing and storage2018
Author(s)
Jun-ichi Yoshikawa, Yosuke Hashimoto, Hisashi Ogawa, Takahiro Serikawa, Yu Shiozawa, Masanori Okada, Warit Asavanant, Atsushi Sakaguchi, Naoto Takanashi, Fumiya Okamoto, Kan Takase, Masaya Kobayashi, Shota Yokoyama, Shuntaro Takeda, Peter van Loock, Akira Furusawa
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Journal Title
SPIE Proceedings
Volume: 10771
Pages: 1-9
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Presentation] Optical quantum information processing and storage2018
Author(s)
Jun-ichi Yoshikawa, Yosuke Hashimoto, Hisashi Ogawa, Takahiro Serikawa, Yu Shiozawa, Masanori Okada, Warit Asavanant, Atsushi Sakaguchi, Naoto Takanashi, Fumiya Okamoto, Kan Takase, Masaya Kobayashi, Shuntaro Takeda, Akira Furusawa
Organizer
SPIE Optics + Photonics, San Diego, USA
Related Report
Int'l Joint Research / Invited