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2013 Fiscal Year Final Research Report

Quantum many-body effects of two-component cold fermionic atoms in optical lattices

Research Project

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Project/Area Number 23540467
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Atomic/Molecular/Quantum electronics
Research InstitutionUniversity of Hyogo

Principal Investigator

SUGA Seiichiro  兵庫県立大学, 工学(系)研究科(研究院), 教授 (40206389)

Project Period (FY) 2011 – 2013
Keywords冷却フェルミ原子 / 光格子 / 3成分内部自由度 / 斥力誘起超流動 / クーパーペアの対称性の制御
Research Abstract

We have investigated superfluid of repulsively interacting three-component fermionic atoms in optical lattices. When two of the three repulsions are stronger than the other, extended s-wave superfluid appears close to half filling. We have determined the phase diagrams of the superfluid state in terms of temperature, the ratio of the repulsions, and filling. We have shown that when the difference in the repulsions is reduced, pairing symmetry changes into a d wave. Thus, the system can be regarded as a quantum simulator for controlling pairing symmetry of superfluid. The system can be realized using 6Li fermionic atoms in optical lattices. The findings provide insights into not only the study of cold atoms, but also the study of superconductivity in correlated electron systems with multiorbitals, such as Iron-based superconductors.

  • Research Products

    (7 results)

All 2014 2013 2012 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (3 results) Remarks (1 results)

  • [Journal Article] Three-body losses of repulsively interacting three-component fermionic atoms in optical lattices2014

    • Author(s)
      S. Suga and K. Inaba
    • Journal Title

      J. Phys. Conference ser

    • Peer Reviewed
  • [Journal Article] Superfluid, Staggered State, and Mott Insulator of Repulsively Interacting Three-Component Fermionic Atoms in Optical Lattices (invited Review article)2013

    • Author(s)
      K. Inaba and S. Suga
    • Journal Title

      Modern Phys. Lett

      Volume: B27 Pages: 1330008-1-24

    • Peer Reviewed
  • [Journal Article] Superfluid state of repulsively interacting three-component fermionic atoms in optical lattices2012

    • Author(s)
      K. Inaba and S. Suga
    • Journal Title

      Phys. Rev. Lett

      Volume: 108 Pages: 255301-1-5

    • Peer Reviewed
  • [Presentation] 光格子中の強相関フェルミ原子混合系における局所揺らぎに起因した超伝道のペア対称性2014

    • Author(s)
      菅誠一郎, 稲葉謙介, 大井俊宗
    • Organizer
      日本物理学会第69回年次大会
    • Place of Presentation
      東海大学30aPS-21
    • Year and Date
      20140327-30
  • [Presentation] Pairing symmetry of superfluid state in repulsively interacting three-component fermionic atoms in optical lattices2013

    • Author(s)
      S. Suga and K. Inaba
    • Organizer
      International Conference on Strongly Correlated Electron Systems
    • Place of Presentation
      Univ. of Tokyo, Tokyo 7P-E-1-6
    • Year and Date
      20130805-09
  • [Presentation] 斥力相互作用をする光格子中の3成分フェルミ原子系における超流動状態2012

    • Author(s)
      菅誠一郎, 稲葉謙介
    • Organizer
      日本物理学会第2012秋季大会
    • Place of Presentation
      横浜国立大学20aAL-11
    • Year and Date
      20120918-21
  • [Remarks]

    • URL

      http://www.eng.u-hyogo.ac.jp/msc/msc11/index.html

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Published: 2015-07-16  

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