• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Many-body effects on properties of attractive Bose-Einstein condensates.

Research Project

Project/Area Number 15340129
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 原子・分子・量子エレクトロニクス・プラズマ
Research InstitutionTokyo Institute of Technology

Principal Investigator

UEDA Masahito  Tokyo Institute of Technology, Graduate School of Science and Engineering, Professor, 大学院・理工学研究科, 教授 (70271070)

Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥7,900,000 (Direct Cost: ¥7,900,000)
Fiscal Year 2005: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2004: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2003: ¥2,700,000 (Direct Cost: ¥2,700,000)
KeywordsAtomic and Molecular Physics / Low temperature physics / Condensed matter theory / Bose-Einstein condensates / 引力相互作用 / 非線形相互作用 / 低次元系 / 多体効果 / 量子ホール効果
Research Abstract

We have studied effects of interactions on properties of gaseous Bose-Einstein condensates (BECs) by focusing on many-body effect and attractive interactions. Below follows the summary of our main results.
(1) Fast rotating BEC. We have shown that a rotating BEC makes a quantum phase transition to the Laughlin state when the angular momentum of the system exceeds h N(N-1), where N is the number of atoms. Above the Laughlin state we find a single-particle excitation branch similar to the roton branch. This branch has been found in fractional quantum Hall systems with a long-range Coulomb interaction. Our system has short-ranged and therefore offers a new insight into this gapful mode.
(2) A BEC is usually created in a confining potential. It is well known that in dimensions higher than one dimension BEC will either collapse or expand in free space. We have shown that the BEC can be stabilized in 2D free space by oscillating the strength of interactions between attractive and repulsive interactions using a Feshbach resonance.
(3) In 3D free space, we have found that BEC cannot be stabilized by the above method, but can be stabilized in the presence of dissipation. This state of matter may be viewed as a self-trapped gaseous superfluid in free space.

Report

(4 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (54 results)

All 2006 2005 2004 2003 Other

All Journal Article (40 results) Book (4 results) Publications (10 results)

  • [Journal Article] Breaking of Chiral Symmetry and Spontaneous Rotation in a Spinor Bose-Einstein Condensate.2006

    • Author(s)
      H.Saito, Y.Kawaguchi, M.Ueda
    • Journal Title

      Phys. Rev. Lett. 96

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Einstein-de Haas Effect in Dipolar Bose-Einstein Condensates.2006

    • Author(s)
      Y.Kawaguchi, H.Saito, M.Ueda
    • Journal Title

      Phys. Rev. Lett. 96

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Nambu-Goldstone Modes in a Rotating Bose-Einstein Condensate.2006

    • Author(s)
      M.Ueda, T.Nakajima
    • Journal Title

      Phys. Rev. A 73

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Breaking of Chiral Symmetry and Spontaneous Rotation in a Spinor Bose-Einstein Condensate.2006

    • Author(s)
      H.Saito, Y.Kawaguchi, M.Ueda
    • Journal Title

      Phys.Rev.Lett. 96

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Einstein-de Haas Effect in Dipolar Bose-Einstein Condensates.2006

    • Author(s)
      Y.Kawaguchi, H.Saito, M.Ueda
    • Journal Title

      Phys.Rev.Lett. 96

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Nambu-Goldstone Modes in a Rotating Bose-Einstein Condensate.2006

    • Author(s)
      M.Ueda, T.Nakajima
    • Journal Title

      Phys.Rev.A 73

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Symmetry Breaking and Enhanced Condensate Fraction of an Attractive Bose-Einstein Condensate.2005

    • Author(s)
      R.Kanamoto, H.Saito, M.Ueda
    • Journal Title

      Phys. Rev. Lett. 94

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Spin textures in rotating two-component Bose-Einstein Condensates.2005

    • Author(s)
      K.Kasamatsu, M.Tsubota, M.Ueda
    • Journal Title

      Phys. Rev. A 71

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Vorticies in Multicomponent Bose-Einstein Condensates.2005

    • Author(s)
      K.Kasamatsu, M.Tsubota, M.Ueda
    • Journal Title

      Int. J. Mod. Phys. B 19

      Pages: 1835-1904

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Spontaneous magnetization and structure formation in a spin-1 ferromagnetic Bose-Einstein condensate.2005

    • Author(s)
      Hiroki Saito, Masahito Ueda
    • Journal Title

      Phys. Rev. A 72

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Diagnostics for the ground-state phase of a spin-2 Bose-Einstein condensate.2005

    • Author(s)
      Hiroki Saito, Masahito Ueda
    • Journal Title

      Phys. Rev. A 72

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Symmetry Breaking and Enhanced Condensate Fraction of an Attractive Bose-Einstein Condensate.2005

    • Author(s)
      R.Kanamoto, H.Saito, M.Ueda
    • Journal Title

      Phys.Rev.Lett. 94

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Spin textures in rotating two-component Bose-Einstein Condensates.2005

    • Author(s)
      K.Kasamatsu, M.Tsubota, M.Ueda
    • Journal Title

      Phys.Rev.A 71

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Vortices in Multicomponent Bose-Einstein Condensates.2005

    • Author(s)
      K.Kasamatsu, M.Tsubota, M.Ueda
    • Journal Title

      Int.J.Mod.Phys.B 19

      Pages: 1835-1904

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Spontaneous magnetization and structure formationin a spin-1 ferromagnetic Bose-Einstein condensate.2005

    • Author(s)
      Hiroki Satio, Masahito Ueda
    • Journal Title

      Phys.Rev.A 72

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Diagnostics for the ground-state phase of a spin-2 Bose-Einstein condensate.2005

    • Author(s)
      Hiroki Satio, Masahito Ueda
    • Journal Title

      Phys.Rev.A 72

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Spin textures in rotating two-component Bose-Einstein condensates.2005

    • Author(s)
      K.Kasamatsu, M.Tsubota, M.Ueda
    • Journal Title

      Phys.Rev.A 71

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Spontaneous magnetization and structure formation in a spin-1 ferromagnetic Bose-Einstein condensate.2005

    • Author(s)
      Hiroki Saito, Masahito Ueda
    • Journal Title

      Phys.Rev.A 72

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Diagnostics for the ground-state phase of a spin-2 Bose-Einstein condensate.2005

    • Author(s)
      Hiroki Saito, Masahito Ueda
    • Journal Title

      Phys.Rev.A 72

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Vorticies in Multicomponent Bose-Einstein Condensates.2005

    • Author(s)
      K.Kasamatsu, M.Tsubota, M.Ueda
    • Journal Title

      Int.J.Mod.Phys.B 19

      Pages: 1835-1904

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Split-merge cycle, fragmented collapse, and vortex disintegration in rotating Bose-Einstein condensates with attractive interactions.2004

    • Author(s)
      H.Saito, M.Ueda
    • Journal Title

      Phys. Rev. A 69

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Bose-Einstein droplet in free space.2004

    • Author(s)
      H.Saito, M.Ueda
    • Journal Title

      Phys. Rev. A 70

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Emergence of Bloch bands in a rotating Bose-Einstein condensate.2004

    • Author(s)
      H.Saito, M.Ueda
    • Journal Title

      Phys. Rev. Lett. 93

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Split-merge cycle, fragmented collapse, and vortex disintegration in rotating Bose-Einstein condensates with attractive interactions.2004

    • Author(s)
      H.Saito, M.Ueda
    • Journal Title

      Phys.Rev.A 69

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Bose-Einstein droplet in free space.2004

    • Author(s)
      H.Saito, M.Ueda
    • Journal Title

      Phys.Rev.A 70

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Emergence of Bloch bands in a rotating Bose-Einstein condensate.2004

    • Author(s)
      H.Saito, M.Ueda
    • Journal Title

      Phys.Rev.Lett. 93

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Split-merge cycle, fragmented collapse, and vortex disintegration in rotating Base-Einstein condensates with attractive interactions2004

    • Author(s)
      H.Saito, M.Ueda
    • Journal Title

      Physical Review A 69

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Quadrupole and scissors modes and nonlinear mode coupling in trapped two-component Base-Einstein condensates2004

    • Author(s)
      K.Kasamatsu, M.Tsubota, M.Ueda
    • Journal Title

      Physical Review A 69

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Divergence-free WKB theory2004

    • Author(s)
      T.Hyouguchi, R.Seto, M.Ueda, S.Adachi
    • Journal Title

      Annals of Physics 312

      Pages: 177-267

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Einstein-Podolsky-Rosen correlation in a gravitational field2004

    • Author(s)
      H.Terashima, M.Ueda
    • Journal Title

      Physical Review A 69

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Multiphoton transitions in a macroscopic quantum two-state system2004

    • Author(s)
      K.Semb S.Saito, M.Thorwart, H.Tanaka, M.Ueda, H.Nakano, H.Takayanagi
    • Journal Title

      Physical Review Letters 93

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Bose-Einstein droplet in free space2004

    • Author(s)
      H.Saito, M.Ueda
    • Journal Title

      Physical Review A 70

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Emergence of Bloch bands in a rotating Bose-Einstein condensate2004

    • Author(s)
      H.Saito, M.Ueda
    • Journal Title

      Physical Review Letters 93

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Vortex molecules in coherently coupled two-component Bose-Einstein2004

    • Author(s)
      K.Kasamatsu, M.Tsubota, M.Ueda
    • Journal Title

      Physical Review Letters 93

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Energy gaps and roton structure above the ν= 1/2 Laughlin state of a rotating dilute Bose-Einstein condensate.2003

    • Author(s)
      T.Nakajima, M.Ueda
    • Journal Title

      Phys. Rev. Lett. 91

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Stability of the quantized circulation of an attractive Bose-Einstein condensates in a rotating torus.2003

    • Author(s)
      R.Kanamoto, H.Saito, M.Ueda
    • Journal Title

      Phys. Rev. A 68

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A consistent picture of a collapsing Bose-Einstein condensate.2003

    • Author(s)
      M.Ueda, H.Saito
    • Journal Title

      J. Phys. Soc. Jpn. Suppl. C 72

      Pages: 127-127

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Energy gaps and roton structure above the ν=1/2 Laughlin state of a rotating dilute Bose-Einstein condensate.2003

    • Author(s)
      T.Nakajima, M.Ueda
    • Journal Title

      Phys.Rev.Lett. 91

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Stability of the quantized circulation of an attractive Bose-Einstein condensates in a rotating torus.2003

    • Author(s)
      R.Kanamoto, H.Saito, M.Ueda
    • Journal Title

      Phys.Rev.A 68

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A consistent picture of a collapsing Bose-Einstein condensate.2003

    • Author(s)
      M.Ueda, H.Satio
    • Journal Title

      J.Phys.Soc.Jpn.Suppl.C 72

      Pages: 127-127

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Book] レーザー冷却された原子気体のボース・アインシュタイン凝縮 (単行本、共著) "現代物理学の歴史と展望"2004

    • Author(s)
      上田 正仁
    • Total Pages
      20
    • Publisher
      朝倉書店
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Book] 現代量子物理学-基礎と応用2004

    • Author(s)
      上田 正仁
    • Total Pages
      246
    • Publisher
      培風館
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Book] レーザー冷却されたボーズ・アインシュタイン凝縮が開く新しい世界 (単行本、共著)パリティブックス"打ち寄せる原子のさざなみ-レーザー冷却とボーズ・アインシュタイン凝縮"2003

    • Author(s)
      上田 正仁
    • Total Pages
      24
    • Publisher
      丸善出版
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Book] Theory of Bose-Einstein Condensation of Laser-Cooled Neutral Atoms in Exploring the Quantum/ Classical Frontier, Recent Advances in Macroscopic Quantum Phenomena.2003

    • Author(s)
      Masahito Ueda
    • Total Pages
      24
    • Publisher
      Nova Science
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Publications] T.Nakajima, M.Ueda: "Energy gaps and roton structure above the Laughlin state of a rotating dilute Bose-Einstein condensate"Phys.Rev.Lett.. vol.91. 140401(1)-140401(4) (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Saito, M.Ueda: "Dynamically Stabilized Bright Solitons in a Two-Dimensional Bose-Einstein Condensate"Phys.Rev.Lett.. vol.90. 040403(1)-040403(4) (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] R.Kanamoto, H.Saito, M.Ueda: "Quantum Phase Transition in one-dimensional Bose-Einstein condensates with attractive interactions"Phys.Rev.. A.vol.67. 013608(1)-013608(7) (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Kasamatsu, M.Tsubota, M.Ueda: "Nonlinear dynamics of vortex lattice formation in a rotating Bose-Einstein condensate"Phys.Rev.. A vol.67. 033610(1)-033610(14) (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Terashima, M.Ueda: "Einstein-Podolsky-Rosen correlation seen from moving observers"Quantum Inf.Comput.. vol.3. 224-228 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Terashima, M.Ueda: "Relativistic Einstein-Podolsky-Rosen crrelation and Bell's inequality"International Journal of Quantum Information (IJQI). vol.1. 93-114 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Kasamatsu, M.Tsubota, M.Ueda: "Vortex phase diagram in rotating two-component Bose-Einstein condensates"Phys.Rev.Lett.. vol.91. 150406(1)-150406(4) (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] R.Kanamoto, H.Saito, M.Ueda: "Stability of the quantized circulation of an attractive Bose-Einstein condensates in a rotating torus"Phys.Rev.. A vol.68. 043619(1)-043619(12) (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Saito, M.Ueda: "Measurement-induced spin squeezing in a cavity"Phys.Rev.. A vol.68. 043820(1)-043820(9) (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Saito, M.Ueda: "Split-merge cycle, fragmented collapse, and vortex disintegration in rotating Bose-Einstein condensates with attractive interactions"Phys.Rev.. A69. 013604(1)-013604(10) (2004)

    • Related Report
      2003 Annual Research Report

URL: 

Published: 2003-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi