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Visualizing the phase separation of a dual-BEC for verifying the dynamical scaling hypothesis

Research Project

Project/Area Number 20H01843
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 13020:Semiconductors, optical properties of condensed matter and atomic physics-related
Research InstitutionOsaka Metropolitan University (2022)
Osaka City University (2020-2021)

Principal Investigator

Inouye Shin  大阪公立大学, 大学院理学研究科, 教授 (10401150)

Co-Investigator(Kenkyū-buntansha) 竹内 宏光  大阪公立大学, 大学院理学研究科, 講師 (10587760)
藤本 和也  東京工業大学, 理学院, 助教 (40838059)
加藤 宏平  大阪公立大学, 南部陽一郎物理学研究所, 特任助教 (60793586)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2022: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2021: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2020: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Keywords量子縮退気体 / 冷却原子 / ボース・アインシュタイン凝縮 / 量子エレクトロニクス
Outline of Research at the Start

気体を極低温に冷却して得られるボースアインシュタイン凝縮体は巨視的な波動関数として振る舞うが、2つのボースアインシュタイン凝縮体が共存している時、その相互作用を急変させるとどのように振る舞うかはよくわかっていない。本研究ではルビジウムとカリウムの混合ボース凝縮体を2次元箱型ポテンシャルに閉じ込め、相分離する際に生じるドメインの時間発展の非破壊観測を行い、動的スケーリング仮説を実験的に検証する。

Outline of Final Research Achievements

Aiming at the experimental exploration of non-equilibrium physics with quenched cold atoms, we worked on improving experimental equipment using a mixture of rubidium and potassium Bose-Einstein condensate. We succeeded in introducing a two-dimensional magneto-optical trap and increasing the resolution of imaging system. With respect to the theory, we investigated the quantum dynamics of the one-dimensional Hubbard model from the viewpoint of classical interface growth and clarified that the conservation law is important for the dynamic scaling of interface roughness. Furthermore, we succeeded in systematically understanding the pattern formation in the phase separation process of two-component BEC and found that Kelvin waves of half-integer quantum vortices can be theoretically understood as Kelvin waves of quantum vortices whose circulation is not a half-integer but an integer.

Academic Significance and Societal Importance of the Research Achievements

超流動体がどのように相分離するかを目指して装置の開発をおこなったことは、日常でも重要な相分離の物理の解明に一歩近づいたという意味で大変意義深い。さらに理論的にも1次元量子系に界面粗さの概念を導入してその振る舞いを明らかにしたことや、超流動体が混合されると界面にどのようなパターンを生じるか明らかにしたことは大変意義深い。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (16 results)

All 2023 2022 2021 2020

All Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Open Access: 5 results) Presentation (9 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Journal Article] Kelvin wave in miscible two-component Bose-Einstein condensates2023

    • Author(s)
      Kasamatsu Kenichi、Okada Maki、Takeuchi Hiromitsu
    • Journal Title

      Physical Review A

      Volume: 107 Issue: 1 Pages: 013309-013309

    • DOI

      10.1103/physreva.107.013309

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Impact of Dissipation on Universal Fluctuation Dynamics in Open Quantum Systems2022

    • Author(s)
      Fujimoto Kazuya、Hamazaki Ryusuke、Kawaguchi Yuki
    • Journal Title

      Physical Review Letters

      Volume: 129 Issue: 11 Pages: 110403-110403

    • DOI

      10.1103/physrevlett.129.110403

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spin-current instability at a magnetic domain wall in a ferromagnetic superfluid : A generation mechanism of eccentric fractional skyrmions2022

    • Author(s)
      Takeuchi Hiromitsu
    • Journal Title

      Physical Review A

      Volume: 105 Issue: 1 Pages: 013328

    • DOI

      10.1103/physreva.105.013328

    • NAID

      120007191628

    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2020395

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Phase diagram of vortices in the polar phase of spin-1 Bose-Einstein condensates2021

    • Author(s)
      Takeuchi Hiromitsu
    • Journal Title

      Physical Review A

      Volume: 104 Issue: 1 Pages: 013316

    • DOI

      10.1103/physreva.104.013316

    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2020394

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Pattern formation of quantum Kelvin-Helmholtz instability in binary superfluids2021

    • Author(s)
      Kokubo Haruya、Kasamatsu Kenichi、Takeuchi Hiromitsu
    • Journal Title

      Physical Review A

      Volume: 104 Issue: 2 Pages: 1-16

    • DOI

      10.1103/physreva.104.023312

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Magnetic soliton: From two to three components with SO(3) symmetry2021

    • Author(s)
      Chai Xiao、Lao Di、Fujimoto Kazuya、Raman Chandra
    • Journal Title

      Physical Review Research

      Volume: 3 Issue: 1

    • DOI

      10.1103/physrevresearch.3.l012003

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Phase diagram of solitons in the polar phase of a spin-1 Bose-Einstein condensate2020

    • Author(s)
      Liu I-Kang、Gou Shih-Chuan、Takeuchi Hiromitsu
    • Journal Title

      Physical Review Research

      Volume: 2 Issue: 3

    • DOI

      10.1103/physrevresearch.2.033506

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Surface-roughness dynamics in a one-dimensional Bose-Hubbard model2022

    • Author(s)
      Kazuya Fujimoto
    • Organizer
      International Conference on Ultra Low Temperature Physics, 2022 Aug. 25-28, Otaru, Japan.
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Nematic superfluidity of spinor Bose-Einstein condensates2022

    • Author(s)
      Hiromitsu Takeuchi
    • Organizer
      Collective Effects & Non-Equilibrium Phenomena in Quantum Gases and Superconductors (CMD29), Manchester, UK, Aug. 21-26 (2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] スピン自由度のあるBECの位相コントラストイメージングにおける測定の反作用の評価2021

    • Author(s)
      船波寛史, 井上慎, 堀越宗一, 加藤宏平
    • Organizer
      日本物理学会 2021年秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Phase diagram of pattern formation in binary Bose-Einstein condensates with shear flow2021

    • Author(s)
      Haruya Kokubo, Kenichi Kasamatsu, Hiromitsu Takeuchi
    • Organizer
      QFS2021: International Conference on Quantum Fluids and Solids (online), Bangalore, India
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 流動界面で生じるケルビン・ヘルムホルツ不安定性の量子・古典クロスオーバー2021

    • Author(s)
      小久保治哉,笠松健一,竹内宏光
    • Organizer
      日本物理学会、年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 乱れたポテンシャル中のフェルミ粒子系における非平衡界面揺らぎの成長則2021

    • Author(s)
      藤本和也、濱崎立資、川口由紀
    • Organizer
      日本物理学会 第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Dynamical scaling of roughness growth in quantum many-body systems2021

    • Author(s)
      Kazuya Fujimoto
    • Organizer
      Quantized Vortices and Nonlinear Waves
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 対向流をもつ相分離した2成分ボース凝縮体における界面の非線形ダイナミクス2020

    • Author(s)
      小久保治哉,笠松健一,竹内宏光
    • Organizer
      日本物理学会、2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] スピノールボース・アインシュタイン凝縮体における非一様シャピロ共鳴2020

    • Author(s)
      今枝祐哉、藤本和也、川口由紀
    • Organizer
      日本物理学会 2020年秋季大会
    • Related Report
      2020 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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