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Entropy control in optical lattice system using a quantum gas microscope

Research Project

Project/Area Number 17H02934
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Atomic/Molecular/Quantum electronics
Research InstitutionTokyo Institute of Technology

Principal Investigator

Kozuma Mikio  東京工業大学, 理学院, 教授 (10302837)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥19,370,000 (Direct Cost: ¥14,900,000、Indirect Cost: ¥4,470,000)
Fiscal Year 2019: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2017: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Keywords光格子 / 冷却原子 / ボース凝縮 / フェルミ縮退 / イッテルビウム / レーザー冷却 / 量子エレクトロニクス / 量子シミュレーション / 量子縮退 / 量子気体顕微鏡 / Mott絶縁体相
Outline of Final Research Achievements

We successfully observed the Mott insulator phase for both bosonic and fermionic Yb atoms in an optical lattice. Such an observation was accomplished by suppressing the intensity and frequency noise of the lattice laser light. To lower the entropy per atom sufficiently compared to 0.35 kB, we plan to apply Filter cooling. As a preliminary experiment, we successfully diminished harmonic potential superposed on the lattice potential by using a digital mirror device.

Academic Significance and Societal Importance of the Research Achievements

今回の成果により、Ybのボソン、フェルミオン双方に対して、光格子系において強相関の物性現象が発現する様子を量子気体顕微鏡でとらえることができた。量子気体顕微鏡は、高いNAを有する対物レンズと一体となったシステムであり、系のポテンシャルを制御することで、温度をさらに桁で下げる力をもっている。今回、初期段階として、光格子に重畳する調和ポテンシャルを抑圧することに成功したが、この制御方法を基本としてFilter冷却を施せば、目的とする極低温を実現し、高温超伝導に代表される各種の物理現象の探索の道が拓かれることになる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (14 results)

All 2019 2018 2017 Other

All Journal Article (3 results) (of which Peer Reviewed: 2 results) Presentation (7 results) (of which Int'l Joint Research: 3 results,  Invited: 4 results) Remarks (4 results)

  • [Journal Article] 量子気体顕微鏡による光格子中に捕捉された原子の観測2018

    • Author(s)
      上妻幹旺
    • Journal Title

      光学

      Volume: Vol.47, No.7 Pages: 295-300

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Magneto-optical trapping of optically pumped metastable europium2018

    • Author(s)
      Ryotaro Inoue, Yuki Miyazawa and Mikio Kozuma
    • Journal Title

      Physical Review A

      Volume: 97 Issue: 6 Pages: 061607-061607

    • DOI

      10.1103/physreva.97.061607

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Site-resolved imaging of a bosonic Mott insulator using ytterbium atoms2017

    • Author(s)
      Miranda Martin、Inoue Ryotaro、Tambo Naoki、Kozuma Mikio
    • Journal Title

      Physical Review A

      Volume: 96 Issue: 4 Pages: 043626-043626

    • DOI

      10.1103/physreva.96.043626

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Presentation] Laser cooling and its application to inertial navigation2019

    • Author(s)
      Mikio Kozuma
    • Organizer
      OPTICS & PHOTONICS International Congress 2019 (Iot Enabling Sensing/Network/AI and Photonics Conference 2019)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] レーザー冷却とその応用2018

    • Author(s)
      上妻幹旺
    • Organizer
      システムナノ技術に関する特別研究専 門委員会第4回研究会「量子センシング、次世代フォトニクスの最前線」
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 冷却原子を用いた量子シミュレーションと量子慣性センサー2018

    • Author(s)
      上妻幹旺
    • Organizer
      公益財団法人応用物理学会第147回微小光学研究会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 173Yb原子系におけるMott絶縁体相の実空間観測2018

    • Author(s)
      井口賢人, 高木將登, ミランダ・マルティン, 井上遼太郎, 上妻幹旺
    • Organizer
      日本物理学会 第73回年次大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] レーザー冷却の基礎と応用2017

    • Author(s)
      上妻幹旺
    • Organizer
      日本原子力研究開発機構 原子力科学研究部門 先端基礎研究センター 第691回ASRC
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Noncooled site-resolved imaging of a Mott-insulator2017

    • Author(s)
      R. Inoue, M. Miranda, N. Tambo, and M. Kozuma
    • Organizer
      Bose-Einstein Condensation 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Noncooled site-resolved imaging of a Mott insulator2017

    • Author(s)
      M. Miranda, R. Inoue, N. Tambo, K. Iguchi, M. Takagi and M. Kozuma
    • Organizer
      International Conference on Optics, Lasers and Spectroscopy (ICOLS 2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Remarks] Quantum simulation with optical lattices

    • URL

      http://www.kozuma.phys.titech.ac.jp/research_category/entry7.html

    • Related Report
      2019 Annual Research Report
  • [Remarks] 上妻研究室HP

    • URL

      http://www.kozuma.phys.titech.ac.jp/

    • Related Report
      2018 Annual Research Report
  • [Remarks] Kozuma laboratory HP

    • URL

      http://www.kozuma-eng.sci.titech.ac.jp/

    • Related Report
      2018 Annual Research Report
  • [Remarks] 光格子を用いた物性研究

    • URL

      http://www.kozuma.phys.titech.ac.jp/research_category/entry7.html

    • Related Report
      2017 Annual Research Report

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Published: 2017-04-28   Modified: 2021-02-19  

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