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Exploring transport of ultracold Fermi gases with nonlinear response theories

Research Project

Project/Area Number 17K14366
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Atomic/Molecular/Quantum electronics
Research InstitutionWaseda University (2018-2019)
Institute of Physical and Chemical Research (2017)

Principal Investigator

Uchino Shun  早稲田大学, 高等研究所, 講師(任期付) (80617465)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsメゾスコピック系 / 冷却原子気体 / 非平衡物理
Outline of Final Research Achievements

Recently, mesoscopic transport systems have been realized in experiments of ultracold atomic gases. We have conducted theoretical studies on quantum-point-contact transport with two-component Fermi gases. First, we have revealed that a current noise measurement, which has been elusive in experiments of ultracold atomic gases due to large experimental error bars, is available in ultracold atomic gases in an optical cavity. Second, we have uncovered novel transport properties emerging in two-terminal quantum-point-contact systems with strongly interacting Fermi gases.

Academic Significance and Societal Importance of the Research Achievements

メゾスコピック系の輸送現象は元来、固体の物性系において研究が進んできた。しかし近年、冷却原子気体を用いた研究も盛んに行われるようになり、固体系との相補的な役割が期待されている。本研究では、現在の固体の物性系で検証するのが難しいメゾスコピック現象に焦点を当て、これまでに知られていない輸送特性を明らかにした。また、光共振器を用いたカレントノイズ測定法の提案により、既存の実験の困難が今後、解消される可能性がある。本研究の成果は、現在行われている実験への重要な示唆を与えるものであり、非平衡量子現象の理解にも重要なものであったと考えている。

Report

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

    (18 results)

All 2020 2019 2018 2017 Other

All Int'l Joint Research (3 results) Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (8 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results) Remarks (2 results)

  • [Int'l Joint Research] EPFL(スイス)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] スイス連邦工科大学ローザンヌ校(スイス)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] スイス連邦工科大学ローザンヌ校(スイス)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Mesoscopic spin transport between strongly interacting Fermi gases2020

    • Author(s)
      Sekino Yuta, Tajima Hiroyuki, Uchino Shun
    • Journal Title

      Physical Review Research

      Volume: 2 Issue: 2 Pages: 023152-023152

    • DOI

      10.1103/physrevresearch.2.023152

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Bosonic superfluid transport in a quantum point contact2020

    • Author(s)
      Uchino Shun, Brantut Jean-Philippe
    • Journal Title

      Physical Review Research

      Volume: 2 Issue: 2 Pages: 023284-023284

    • DOI

      10.1103/physrevresearch.2.023284

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Role of Nambu-Goldstone modes in the fermionic superfluid point contact2020

    • Author(s)
      Uchino Shun
    • Journal Title

      Physical Review Research

      Volume: -

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Many Fermi polarons at nonzero temperature2018

    • Author(s)
      Tajima Hiroyuki、Uchino Shun
    • Journal Title

      New Journal of Physics

      Volume: 20 Issue: 7 Pages: 073048-073048

    • DOI

      10.1088/1367-2630/aad1e7

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Universal noise in continuous transport measurements of interacting fermions2018

    • Author(s)
      Uchino Shun、Ueda Masahito、Brantut Jean-Philippe
    • Journal Title

      Physical Review A

      Volume: 98 Issue: 6 Pages: 063619-063619

    • DOI

      10.1103/physreva.98.063619

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] ボース原子気体超流動体のメゾスコピック輸送2020

    • Author(s)
      内野瞬
    • Organizer
      日本物理学会春季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Mesoscopic transport in a bosonic superfluid point contact2019

    • Author(s)
      Uchino Shun
    • Organizer
      Bose-Einstein condensation 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Quantum Transport in Ultracold Atomic Gases2019

    • Author(s)
      内野瞬
    • Organizer
      アトムの会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Universal aspects of interacting fermions in a cavity2018

    • Author(s)
      Shun Uchino
    • Organizer
      Quantum Transport with Cold Atoms Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 冷却フェルミ気体におけるメゾスコピック伝導2018

    • Author(s)
      内野瞬
    • Organizer
      量子情報・物性の新潮流
    • Related Report
      2018 Research-status Report
  • [Presentation] 光共振器中での冷却フェルミ気体におけるユニバーサルノイズ2018

    • Author(s)
      内野瞬
    • Organizer
      日本物理学会秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 内部自由度を持つ冷却原子気体における非平衡ダイナミクス2018

    • Author(s)
      内野瞬
    • Organizer
      日本物理学会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Anomalous conduction property in an attractively-interacting Fermi gas2017

    • Author(s)
      Shun Uchino
    • Organizer
      Bose-Einstein condensation 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Remarks]

    • URL

      https://sites.google.com/site/shunuchino/

    • Related Report
      2017 Research-status Report
  • [Remarks]

    • URL

      https://www.waseda.jp/inst/wias/other/2018/04/02/5057/

    • Related Report
      2017 Research-status Report

URL: 

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

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