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Theoretical studies on the realization of a p-wave superfluid Fermi gas by using a synthetic gauge field

Research Project

Project/Area Number 25400418
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Atomic/Molecular/Quantum electronics
Research InstitutionKeio University

Principal Investigator

Ohashi Yoji  慶應義塾大学, 理工学部, 教授 (60272134)

Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywordsフェルミ原子気体 / p波超流動 / 人工ゲージ場 / 反対称スピン軌道相互作用 / BCS-BECクロスオーバー / スピン軌道相互作用 / BCS-BECクロスオーバー / 非平衡超流動 / 強結合効果 / p波対振幅
Outline of Final Research Achievements

I have theoretically investigated a possible idea to realize a p-wave superfluid Fermi atomic gas, starting from the s-wave superfluid phase with a synthetic anti-symmetric spin-orbit interaction. I clarified what type of p-wave pair amplitude is induced by various kinds of spin-orbit couplings. I also confirmed that the superfluid phase transition temperature where large p-wave pair amplitude is induced is accessible within the current experimental technology. Using the induced p-wave pair amplitude in an s-wave superfluid Fermi gas, I showed that, when one suddenly changes the symmetry of pairing interaction from the s-wave one to a p-wave one, one can immediately realize a p-wave superfluid state.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (40 results)

All 2016 2015 2014 2013 Other

All Journal Article (15 results) (of which Peer Reviewed: 15 results,  Acknowledgement Compliant: 11 results,  Open Access: 3 results) Presentation (24 results) (of which Int'l Joint Research: 2 results) Remarks (1 results)

  • [Journal Article] Specific heat and effects of pairing fluctuations in the BCS-BEC-crossover regime of an ultracold Fermi gas2016

    • Author(s)
      Pieter van Wyk, Hiroyuki Tajima, Ryo Hanai, and Yoji Ohashi
    • Journal Title

      Physical Review A

      Volume: 93 Issue: 1

    • DOI

      10.1103/physreva.93.013621

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Cooper pairs with zero center-of-mass momentum and their first-order correlation function in a two-dimensional ultracold Fermi gas near a Berezinskii-Kosterlitz-Thouless transition2016

    • Author(s)
      Morio Matsumoto, Daisuke Inotani, and Yoji Ohashi
    • Journal Title

      Physical Review A

      Volume: 93 Issue: 1

    • DOI

      10.1103/physreva.93.013619

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Strong-coupling corrections to spin susceptibility in the BCS-BEC-crossover regime of a superfluid Fermi gas2016

    • Author(s)
      Hiroyuki Tajima, Ryo Hanai, and Yoji Ohashi
    • Journal Title

      Physical Review A

      Volume: 93 Issue: 1

    • DOI

      10.1103/physreva.93.013610

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Proposed method to realize the p-wave superfluid state using an s-wave superfluid Fermi gas with a synthetic spin-orbit interaction2015

    • Author(s)
      Tokitake Yamaguchi and Yoji Ohashi
    • Journal Title

      Physical Review A

      Volume: 92 Issue: 1

    • DOI

      10.1103/physreva.92.013615

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Triplet pair amplitude in a trapped s-wave superfluid Fermi gas with broken spin rotation symmetry2015

    • Author(s)
      Yuki Endo, Daisuke Inotani, Ryo Hanai, and Yoji Ohashi
    • Journal Title

      Physical Review A

      Volume: 92 Issue: 2

    • DOI

      10.1103/physreva.92.023610

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Pairing fluctuations and an anisotropic pseudogap phenomenon in an ultracold superfluid Fermi gas with plural p-wave superfluid phases2015

    • Author(s)
      Daisuke Inotani and Yoji Ohashi
    • Journal Title

      Physical Review A

      Volume: 92 Issue: 6

    • DOI

      10.1103/physreva.92.063638

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Heteropairing and component-dependent pseudogap phenomena in an ultracold Fermi gas with different species with different masses2014

    • Author(s)
      R. Hanai, and Y. Ohashi
    • Journal Title

      Phys. Rev. A

      Volume: 90 Issue: 4

    • DOI

      10.1103/physreva.90.043622

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Green’s-function formalism for a condensed Bose gas consistent with infrared-divergent longitudinal susceptibility and Nepomnyashchii-Nepomnyashchii identity2014

    • Author(s)
      S. Watabe, and Y. Ohashi
    • Journal Title

      Phys. Rev. A

      Volume: 90 Issue: 1

    • DOI

      10.1103/physreva.90.013603

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Spin-gap phenomenon in a strongly interacting ultracold Fermi gas2014

    • Author(s)
      H. Tajima, R. Hanai, and Y. Ohashi
    • Journal Title

      J. Phys. Conf. Series

      Volume: 568 Issue: 1 Pages: 012019-012019

    • DOI

      10.1088/1742-6596/568/1/012019

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Hetero-pairing and pseudogap phenomena in an ultracold Fermi gas with mass imbalance2014

    • Author(s)
      R. Hanai, and Y. Ohashi
    • Journal Title

      J. Phys. Conf. Series

      Volume: 568 Issue: 1 Pages: 012004-012004

    • DOI

      10.1088/1742-6596/568/1/012004

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Pseudogap phenomena in a two-dimensional ultracold Fermi gas near the Berezinskii-Kosterlitz-Thouless transition2014

    • Author(s)
      M. Matsumoto, and Y. Ohashi
    • Journal Title

      J. Phys. Conf. Series

      Volume: 568 Issue: 1 Pages: 012012-012012

    • DOI

      10.1088/1742-6596/568/1/012012

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Single-Particle Excitations and Hetero-Pairing Effects in an Ultracold Fermi Gas with Mass Imbalance2014

    • Author(s)
      Ryo Hanai, and Yoji Ohashi
    • Journal Title

      JPS Conference Proceedings

      Volume: 1

    • DOI

      10.7566/jpscp.1.012094

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Low-dimensional pairing fluctuations and pseudogapped photoemission spectrum in a trapped two-dimensional Fermi gas2013

    • Author(s)
      Ryota Watanabe, Shunji Tsuchiya, and Yoji Ohashi
    • Journal Title

      Physical Review A

      Volume: 88 Issue: 1 Pages: 13637-13637

    • DOI

      10.1103/physreva.88.013637

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Comparative studies of many-body corrections to an interacting Bose-Einstein condensate2013

    • Author(s)
      Shohei Watabe, and Yoji Ohashi
    • Journal Title

      Physical Review A

      Volume: 88 Issue: 5

    • DOI

      10.1103/physreva.88.053633

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Excitation properties and effects of mass imbalance in the BCS-BEC crossover regime of an ultracold Fermi gas2013

    • Author(s)
      Ryo Hanai, Takashi Kashimura, Ryota Watanabe, Daisuke Inotani, and Yoji Ohashi
    • Journal Title

      Physical Review A

      Volume: 88 Issue: 5

    • DOI

      10.1103/physreva.88.053621

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] p波相互作用するFermi原子気体における比熱に対する強結合効果2016

    • Author(s)
      猪谷太輔、Pieter van Wyk, 大橋洋士
    • Organizer
      日本物理学会
    • Place of Presentation
      東北学院大学(宮城県・仙台市)
    • Year and Date
      2016-03-21
    • Related Report
      2015 Annual Research Report
  • [Presentation] 人工ゲージ場下の冷却フェルミ原子気体系におけるp波超流動実現に向けた理論解析22016

    • Author(s)
      山口辰威、猪谷太輔、大橋洋士
    • Organizer
      日本物理学会
    • Place of Presentation
      東北学院大学(宮城県・仙台市)
    • Year and Date
      2016-03-21
    • Related Report
      2015 Annual Research Report
  • [Presentation] スピンインバランスのある調和ポテンシャル中のs波超流動フェルミ気体におけるパリティ混成効果2015

    • Author(s)
      猪谷太輔、大橋洋士
    • Organizer
      日本物理学会
    • Place of Presentation
      関西大学(大阪府・吹田市)
    • Year and Date
      2015-09-17
    • Related Report
      2015 Annual Research Report
  • [Presentation] 人工ゲージ場下の冷却フェルミ原子気体系におけるp波超流動実現に向けた理論解析2015

    • Author(s)
      山口辰威、猪谷太輔、大橋洋士
    • Organizer
      日本物理学会
    • Place of Presentation
      関西大学(大阪府・吹田市)
    • Year and Date
      2015-09-17
    • Related Report
      2015 Annual Research Report
  • [Presentation] Parity-mixing effect in a trapped s-wave superfluid Fermi gas with broken spin-rotation symmetry2015

    • Author(s)
      Daisuke Inotani, and Yoji Ohashi
    • Organizer
      International symposium on Quantum Fluids and Solids  (QFS2015)
    • Place of Presentation
      NewYork (USA)
    • Year and Date
      2015-08-13
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Rashbon bound states associated with a spherical spin-orbit coupling in an ultracold Fermi gas with an s-wave interaction2015

    • Author(s)
      Tokitake Yamaguchi, Daisuke Inotani, and Yoji Ohashi
    • Organizer
      International symposium on Quantum Fluids and Solids  (QFS2015)
    • Place of Presentation
      NewYork (USA)
    • Year and Date
      2015-08-13
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 調和ポテンシャル中の引力相互作用するフェルミ原子気体における強結合効果2015

    • Author(s)
      猪谷太輔,大橋洋士
    • Organizer
      日本物理学会年会
    • Place of Presentation
      早稲田大学(東京都・新宿区)
    • Year and Date
      2015-03-22
    • Related Report
      2014 Research-status Report
  • [Presentation] 流入と散逸のある電子正孔系の凝縮相における集団励起2015

    • Author(s)
      花井亮, Peter B. Littlewood, 大橋洋士
    • Organizer
      日本物理学会年会
    • Place of Presentation
      早稲田大学(東京都・新宿区)
    • Year and Date
      2015-03-21
    • Related Report
      2014 Research-status Report
  • [Presentation] Intrinsic p-wave pair amplitude in a trapped ultracold s-wave superfluid Fermi gas2015

    • Author(s)
      Yuki Endo, Daisuke Inotani, Ryo Hanai, and Yoji Ohashi
    • Organizer
      APS March Meeting
    • Place of Presentation
      San Antonio, Texas (USA)
    • Year and Date
      2015-03-04
    • Related Report
      2014 Research-status Report
  • [Presentation] Pseudogap phenomenon near the phase transition from px- to px+ipy-wave Fermi superuid2015

    • Author(s)
      Daisuke Inotani, and Yoji Ohashi
    • Organizer
      APS March Meeting
    • Place of Presentation
      San Antonio, Texas (USA)
    • Year and Date
      2015-03-04
    • Related Report
      2014 Research-status Report
  • [Presentation] 非平衡定常状態下の励起子系における強結合効果2014

    • Author(s)
      花井亮, Peter B. Littlewood, 大橋洋士
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学 (愛知県・春日井市)
    • Year and Date
      2014-09-08
    • Related Report
      2014 Research-status Report
  • [Presentation] スピン軌道相互作用のある強結合フェルミ原子気体系における p波対振幅の誘起2014

    • Author(s)
      山口辰威、大橋洋士
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学 (愛知県・春日井市)
    • Year and Date
      2014-09-07
    • Related Report
      2014 Research-status Report
  • [Presentation] パリティを破った人工スピン軌道相互作用を有する冷却フェルミ原子ガス超流動における強結合効果とp波対振幅の誘起2014

    • Author(s)
      山口辰威、大橋洋士
    • Organizer
      熱場の量子論とその応用
    • Place of Presentation
      理化学研究所 (埼玉県・和光市)
    • Year and Date
      2014-09-03
    • Related Report
      2014 Research-status Report
  • [Presentation] Spin-gap phenomenon in a strongly interacting ultracold Fermi gas2014

    • Author(s)
      Hiroyuki Tajima, Ryo Hanai, and Yoji Ohashi
    • Organizer
      27th International Conference on Low Temperature Physics (LT27)
    • Place of Presentation
      Buenos Aires (Argentina)
    • Year and Date
      2014-08-08
    • Related Report
      2014 Research-status Report
  • [Presentation] Hetero-pairing and pseudogap phenomena in an ultracold Fermi gas with mass imbalance2014

    • Author(s)
      Ryo Hanai, and Yoji Ohashi
    • Organizer
      27th International Conference on Low Temperature Physics (LT27)
    • Place of Presentation
      Buenos Aires (Argentina)
    • Year and Date
      2014-08-08
    • Related Report
      2014 Research-status Report
  • [Presentation] Pseudogap phenomena in a two-dimensional ultracold Fermi gas near the Berezinskii-Kosterlitz-Thouless transition2014

    • Author(s)
      Morio Matsumoto, and Yoji Ohashi
    • Organizer
      27th International Conference on Low Temperature Physics (LT27)
    • Place of Presentation
      Buenos Aires (Argentina)
    • Year and Date
      2014-08-08
    • Related Report
      2014 Research-status Report
  • [Presentation] Precursor of the Nambu-Goldstone mode in a non-equilibrium strongly interacting Fermi gas2014

    • Author(s)
      Ryo Hanai, Peter B. Littlewood, and Yoji Ohashi
    • Organizer
      International Workshop on "Higgs Modes in Condensed Matter and Quantum Gases"
    • Place of Presentation
      京都大学基礎物理学研究所 (京都市・京都府)
    • Year and Date
      2014-06-24
    • Related Report
      2014 Research-status Report
  • [Presentation] Strong-coupling phenomena and non-equilibrium effects in an exciton-polariton gas2014

    • Author(s)
      Ryo Hanai, and Yoji Ohashi
    • Organizer
      7th International Conference on Spontaneous Coherence in Excitonic Systems ICSCE-7
    • Place of Presentation
      The Prince Hakone (神奈川県・足柄下郡)
    • Year and Date
      2014-04-22
    • Related Report
      2014 Research-status Report
  • [Presentation] Superfluid phase transition and effects of mass imbalance in the BCS-BEC crossover regime of an ultracold Fermi gas: A self-consistent T-matrix theory2014

    • Author(s)
      Ryo Hanai, and Yoji Ohashi
    • Organizer
      APS March Meeting
    • Place of Presentation
      Denver, Colorado, US
    • Related Report
      2013 Research-status Report
  • [Presentation] スピン軌道相互作用のある強結合フェルミ原子気体に対する有限温度解析2014

    • Author(s)
      松浦辰威,大橋洋士
    • Organizer
      日本物理学会
    • Place of Presentation
      東海大学
    • Related Report
      2013 Research-status Report
  • [Presentation] 2次元フェルミ原子ガス超流動におけるBKT転移温度近傍での強結合効果とクロスオーバー現象2014

    • Author(s)
      松本杜青,大橋洋士
    • Organizer
      日本物理学会
    • Place of Presentation
      東海大学
    • Related Report
      2013 Research-status Report
  • [Presentation] Single-particle excitations and strong-coupling effects in an ultracold Fermi gas with mass imbalance2013

    • Author(s)
      Ryo Hanai, Takashi Kashimura, Ryota Watanabe, Daisuke Inotani, Yoji Ohashi
    • Organizer
      The 12th Asia Pacific Physics Conference (APPC12)
    • Place of Presentation
      International conference hall, Makuhari Messe, Japan
    • Related Report
      2013 Research-status Report
  • [Presentation] Self-consistent T-matrix approach to an interacting utltracold Fermi gas with mass imbalance2013

    • Author(s)
      Ryo Hanai, Yoji Ohashi
    • Organizer
      International Symposium on Quantum Fluids and Solids (QFS2013)
    • Place of Presentation
      Kunibiki Messe, Matsue, Japan
    • Related Report
      2013 Research-status Report
  • [Presentation] スピン軌道相互作用のある冷却フェルミ原子気体におけるBCS-BECクロスオーバー2013

    • Author(s)
      松浦辰威,花井亮、田島祐之、大橋洋士
    • Organizer
      日本物理学会
    • Place of Presentation
      徳島大学
    • Related Report
      2013 Research-status Report
  • [Remarks] 慶應義塾大学研究者情報総覧 (理工学部 物理学科 大橋洋士)

    • URL

      http://k-ris.keio.ac.jp/Profiles/123/0012288/profile.html

    • Related Report
      2015 Annual Research Report

URL: 

Published: 2014-07-25   Modified: 2019-07-29  

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