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High-purity massive entaglement generator pumped by incoherent light source such as LED

Research Project

Project/Area Number 18K19029
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 30:Applied physics and engineering and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

FUKATSU SUSUMU  東京大学, 大学院総合文化研究科, 教授 (60199164)

Project Period (FY) 2018-06-29 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Keywordsインコヒーレント光源 / LED励起 / 自発的パラメトリック下方変換 / 伝令付き単一光子発生 / Hong-Ou-Mandel2光子干渉 / エンタングル光子対発生器 / LED / パラメトリック下方変換 / 量子エンタングルメント / 同時並列生成 / モードマッピング法 / 単一光子 / アンチバンチング
Outline of Final Research Achievements

Quantum entanglement is relevant in the fields of quantum physics and quantum information processing, which plays a pivotal role in quantum-enhanced technologies that arguably outperform the classical counterparts. One of the established ways to create entangled photon pairs is spontaneous parametric down-conversion in a second-order nonlinear crystal. However, the trade-off between spectral purity and emission rate raises a concern, which practically limits the pump source to a coherent one such as laser. Here we propose an affordable, high-power incoherent light source like light-emitting diode (LED) for use as the pump source for efficient massive high-purity entanglement generation. Building on the successful heralded single-photon generation under LED pumping in the earlier phase of the project, a Hong-Ou-Mandel two-photon interference experiment was attempted. Highly visible HOM dips due to photon bunching were observed, which promises convenient access to entanglement with LEDs.

Academic Significance and Societal Importance of the Research Achievements

インコヒーレント光源を用いて量子エンタングルメントを生成することは、それ自体が一大技術革新である一方、従来は看過されてきた励起光の干渉性の高さすなわちコヒーレンスのもたらすエンタングルメントの質に関する学理の解明にもつながる。良質のエンタングルメント生成には高励起パワーに加えて大きな結晶が必要とされるが、本研究が目指すインコヒーレント光励起のエンタングルメント光子対生成によって結晶長と励起光コヒーレンスとの不整合の問題が根本的に解消できれば、光源選択の幅が拡がるとともに経済的でコンパクトな大規模並列量子もつれ生成器の実現を初めとしてその恩恵は計り知れない。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (23 results)

All 2020 2019 2018

All Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (19 results) (of which Int'l Joint Research: 8 results,  Invited: 1 results)

  • [Journal Article] Heralded single-photon source fueled by light-emitting diode2019

    • Author(s)
      Daiki Nishii, Yoshiki O-oka, Youhei Okawa, and Susumu Fukatsu
    • Journal Title

      Applied Physics Letters

      Volume: 115 Issue: 21 Pages: 211106-211106

    • DOI

      10.1063/1.5115252

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hierarchical Hybrid Metal-Organic Frameworks: Tuning the Visible/Near-Infrared Optical Properties by a Combination of Porphyrin and Its Isomer Units2019

    • Author(s)
      Y. Yang, M. Ishida, Y. Yasutake, S. Fukatsu, C. Fukakusa, M-a. Morikawa, T. Yamada, N. Kimizuka, H. Furuta
    • Journal Title

      Inorg. Chem.

      Volume: 58 Issue: 7 Pages: 4647-4656

    • DOI

      10.1021/acs.inorgchem.9b00251

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Doubly N‐Confused Calix [6] phyrin Bis‐Organopalladium Complexes: Photostable Triplet Sensitizers for Singlet Oxygen Generation2019

    • Author(s)
      Poornenth Pushpanandan, Dong-Hoon Won, Shigeki Mori, Yuhsuke Yasutake, Susumu Fukatsu, Masatoshi Ishida, Hiroyuki Furuta
    • Journal Title

      Chemistry-An Asian Journal

      Volume: 1 Issue: 10 Pages: 1-1

    • DOI

      10.1002/asia.201801671

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Phosphorescent rhenium-dipyrrinates: efficient photosensitizers for singlet oxygen generation2019

    • Author(s)
      Neha Manav, Praseetha E Kesavan, Masatoshi Ishida, Shigeki Mori, Yuhsuke Yasutake, Susumu Fukatsu, Hiroyuki Furuta, Iti Gupta
    • Journal Title

      Dalton Transactions

      Volume: 48 Issue: 7 Pages: 2467-2478

    • DOI

      10.1039/c8dt04540b

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 有機無機ペロブスカイトにおける光誘起局所構造相転移2020

    • Author(s)
      田中 陽、安武 裕輔、深津 晋
    • Organizer
      第67回応用物理学会春季学術講演会(上智大学) 15a-A402-4 (開催中止. 予稿集発行により発表成立)
    • Related Report
      2019 Annual Research Report
  • [Presentation] LEDで励起したSPDC光子対のHong-Ou-Mandel干渉2020

    • Author(s)
      大岡 佳生、深津 晋
    • Organizer
      第67回応用物理学会春季学術講演会(上智大学) 14p-B406-5 (開催中止. 予稿集発行により発表成立)
    • Related Report
      2019 Annual Research Report
  • [Presentation] パラメトリック下方変換で生成した光子対を用いた時間ドメインゴーストイメージングによる干渉フリンジの再生2020

    • Author(s)
      大岡 佳生、深津 晋
    • Organizer
      第67回応用物理学会春季学術講演会(上智大学) 14p-B406-4 (開催中止. 予稿集発行により発表成立)
    • Related Report
      2019 Annual Research Report
  • [Presentation] Stretching the bandwidth of physical measurements by compressed sensing2020

    • Author(s)
      Shunsuke Fujisawa, Susumu Fukatsu
    • Organizer
      APS March Meeting 2020 L10.00002, Denver, CO, USA (Cancelled. Abstract available)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Quantum-Enhanced Magneto-optic Measurements in a Dissipative Medium2019

    • Author(s)
      Youhei Okawa, Shiho Morimoto, Yuhsuke Yasutake, Susumu Fukatsu
    • Organizer
      The 5th Quantum Information and Measurement
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Single-photon source pumped by light-emitting diode2019

    • Author(s)
      D. Nishii, Y. O-oka, S. Fukatsu
    • Organizer
      The XVI-th International Conference on Quantum Optics and Quantum Information
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A legitimate ghost diffraction experiment performed in time domain2019

    • Author(s)
      Y. O-oka, S. Fukatsu
    • Organizer
      SPIE. Optics + Optoelectronics (Clarion Congress Hotel, Prague, Czech Rep.) Paper 11027-9
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Generation of heralded nonclassical photons by LED pumping2019

    • Author(s)
      D. Nishii, Y. O-oka, Y. Okawa, S. Fukatsu
    • Organizer
      SPIE. Optics + Photonics, (San Diego Convention Center, CA, USA) Paper 11134-30
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ghost imaging boosts ghost diffraction-interference capability2019

    • Author(s)
      Y. O-oka, S. Fukatsu
    • Organizer
      SPIE. Optics + Photonics, (San Diego Convention Center, CA, USA) Paper 11134-7
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Decoherence-free transmission of two-color polarization-entangled photons through single-mode fiber2019

    • Author(s)
      Y. Okawa, S. Fujisawa, Y. Yasutake, S. Fukatsu
    • Organizer
      SPIE. Optics + Photonics, (San Diego Convention Center, CA, USA) Paper 1134-2
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 圧縮センシングを用いた測定器の帯域を超える信号の時間波形回復2019

    • Author(s)
      藤澤 俊祐、大岡 佳生、深津 晋
    • Organizer
      第123回数理モデル化と問題解決研究会(MPS), (沖縄科学技術大学院大学(OIST)) No. 47
    • Related Report
      2019 Annual Research Report
  • [Presentation] 全強度測定によらない時系列データのゴーストイメージング2019

    • Author(s)
      大岡 佳生、藤澤 俊祐、 深津 晋
    • Organizer
      第80回応用物理学会秋季学術講演会(北海道大学) 19p-E204-11
    • Related Report
      2019 Annual Research Report
  • [Presentation] 有機無機ペロブスカイトのアンチストークス蛍光の温度依存性2019

    • Author(s)
      田中 陽、安武 裕輔、深津 晋
    • Organizer
      第80回応用物理学会秋季学術講演会(北海道大学) 19p-E101-14
    • Related Report
      2019 Annual Research Report
  • [Presentation] Is foresight better than hindsight? - Implementing a viable temporal differential ghost imaging protocol2019

    • Author(s)
      Yoshiki O-oka, Susumu Fukatsu
    • Organizer
      International Conference of Multimedia and Information Processing 2019
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] ゴーストイメージングによる回折干渉フリンジの再生2018

    • Author(s)
      大岡佳生、深津 晋
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 時間ドメイン圧縮センシングによるヘテロダインビートのゴーストイメージング2018

    • Author(s)
      大岡佳生、藤澤俊祐、深津 晋
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] LED励起によるパラメトリック下方変換光子対発生2018

    • Author(s)
      西井 大生、大岡佳生、深津 晋
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 音響ゴーストイメージング2018

    • Author(s)
      大岡佳生、深津 晋
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 隠れたエンタングルメントの検出2018

    • Author(s)
      大川洋平, 藤澤俊輔, 深津 晋
    • Organizer
      電子通信情報学会 QIT38
    • Related Report
      2018 Research-status Report

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Published: 2018-07-25   Modified: 2021-02-19  

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