Solitons and topological defects in multicomponent Bose-Einstein condensates

• Project/Area Number: 18740213
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Kinki University (2008); Ishikawa National College of Technology (2006-2007)
• Principal Investigator: KASAMATSU Kenichi Kinki University, 理工学部理学科, 講師 (70413763)
• Project Period (FY): 2006 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,310,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥210,000); Fiscal Year 2008: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2007: ¥1,000,000 (Direct Cost: ¥1,000,000); Fiscal Year 2006: ¥1,400,000 (Direct Cost: ¥1,400,000)
• Keywords: ボースアインシュタイン凝縮 / 超流動 / 冷却原子 / 量子渦 / パターン形成 / 光格子 / ジョセフソン効果 / ソリトン / 変調不安定性

Research Abstract

本研究ではナノケルビンの超低温まで冷却された中性原子気体のボース・アインシュタイン凝縮体(以下BECと略す)で起こる超流動現象と原子間相互作用の効果によって生じる非線形現象に関しての理論的研究を行った.2成分のBECの原子間相互作用によって起こる相分離の不安定性による種々のパターン形成の非線形ダイナミクスを明らかにした.またBECに存在し,超流動性に深く関与する特異な渦の構造を明らかにした.

Research Products

• [Journal Article] Uniformly frustrated bosonic Josephson junction array (2009)
  • Author(s): K. Kasamatsu
  • Journal Title: Physical Review A 79
  • Peer Reviewed
• [Journal Article] Vortex sheet in rotating two-component Bose-Einstein condensates (2009)
  • Author(s): K. Kasamatsu, M. Tsubota
  • Journal Title: Physical Review A 79
  • Peer Reviewed
• [Journal Article] Spontaneous radiation and amplification of Kelvin waves on quantized vortices in Bose-Einstein condensates (2009)
  • Author(s): H. Takeuchi, K. Kasamatsu, and M. Tsubota
  • Journal Title: Physical Review A 79
  • Peer Reviewed
• [Journal Article] Uniformly frustrated Josephson junction array in trapped Bose-Einstein condensates (2009)
  • Author(s): K. Kasamatsu
  • Journal Title: a special issue of Journal of Physics Condensed Matter (in press)
  • Peer Reviewed
• [Journal Article] Uniformly frustrated bosonic Josephson junction array (2009)
  • Author(s): Kenichi Kasamatsu
  • Journal Title: Physical Review A 79
  • Peer Reviewed
• [Journal Article] Vortex sheet in rotating two-component Bose-Einstein condensates (2009)
  • Author(s): Kenichi Kasamatsu
  • Journal Title: Physical Review A 79
  • Peer Reviewed
• [Journal Article] Spontaneous radiation and amplification of Kelvin waves on quantized vortices in Bose-Einstein condensates (2009)
  • Author(s): Hiromitsu Taueuchi
  • Journal Title: Physical Review A 79
  • Peer Reviewed
• [Journal Article] Vortex Lattices in Rotating Bose-Einstein Condensate in an Optical Lattice : Analogy to Uniformly Frustrated Josephson Junction Arrays (2008)
  • Author(s): K. Kasamatsu
  • Journal Title: Journal of Low Temperature Physics 150 Pages: 593-598
  • Peer Reviewed
• [Journal Article] Quantized vortices in atomic Bose-Einstein condensates (2008)
  • Author(s): K. Kasamatsu, M. Tsubota
  • Journal Title: Progress in Low Temperature Physics 16 Pages: 349-401
  • Peer Reviewed
• [Journal Article] Quantized vortices in atomic Bose-Einstein condensates (2008)
  • Author(s): Kenichi Kasamatsu
  • Journal Title: Progress of Low Temperature Physics 16 Pages: 349-401
  • Peer Reviewed
• [Journal Article] Vortex Lattices in Rotating Bose-Einstein Condensate in an Optical Lattice: Analogy to Uniformly Frustrated Josephson-Junction Arrays (2008)
  • Author(s): K. Kasamatsu
  • Journal Title: Journal of Low Temperature Physics 150 Pages: 593-598
  • Peer Reviewed
• [Journal Article] Static and Dynamic Properties of Multicomponent Bose-Einstein Condensates of Ytterbium Atoms (2008)
  • Author(s): K. Kasamatsu and M. Tsubota
  • Journal Title: Journal of Low Temperature Physics 150 Pages: 599-604
  • Peer Reviewed
• [Journal Article] Dynamic Properties of Vortices in a Bose-Einstein Condensate in a Rotating Lattice (2007)
  • Author(s): K. Kasamatsu, M. Tsubota
  • Journal Title: Journal of Low Temperature Physics 148 Pages: 357-362
  • Peer Reviewed
• [Journal Article] Static and Dynamic Properties of Multicomponent Bose-Einstein Condensates of Ytterbium Atoms (2007)
  • Author(s): K. Kasamatsu, M. Tsubota
  • Journal Title: Journal of Low Temperature Physics 150 Pages: 599-604
  • Peer Reviewed
• [Journal Article] Dynamic Properties of Vortices in a Bose-Einstein Condensate in a Rotating Lattice (2007)
  • Author(s): K. Kasamatsu and M. Tsubota
  • Journal Title: Journal of Low Temperature Physics 148 Pages: 357-362
  • Peer Reviewed
• [Journal Article] Modulation instability and solitary-wave formation in two-component Bose-Einstein condensates (2006)
  • Author(s): K. Kasamatsu, M. Tsubota
  • Journal Title: Physical Review A 74
  • Peer Reviewed
• [Journal Article] Dynamical Vortex Phases in a Bose-Einstein Condensate Driven by a Rotating Optical Lattice (2006)
  • Author(s): K. Kasamatsu, M. Tsubota
  • Journal Title: Physical Review Letters 97
  • Peer Reviewed
• [Journal Article] Modulation instability and solitary-wave formation in two-component Bose-Einstein condensates (2006)
  • Author(s): Kenichi Kasamatsu, Makoto Tsubota
  • Journal Title: Physical Review A 74 Pages: 13617-13617
• [Journal Article] Vortex Structures in Rotating Two-component Bose-Einstein Condensates in an Anharmonic Trapping Potential (2006)
  • Author(s): Kenichi Kasamatsu, Makoto Tsubota
  • Journal Title: the AIP Conference Proceedings series 850 Pages: 57-57
• [Journal Article] Dynamical Vortex Phases in a Bose-Einstein Condensate Driven by a Rotating Optical Lattice (2006)
  • Author(s): Kenichi Kasamatsu, Makoto Tsubota
  • Journal Title: Physical Review Letters 97 Pages: 240404-240404
• [Presentation] 回転2成分ボース凝縮体における渦シート構造 (2009)
  • Author(s): 笠松健一
  • Organizer: 日本物理学会第64回年次大会
  • Place of Presentation: 立教大学
  • Year and Date: 2009-03-28
• [Presentation] Uniformly frustrated Josephson junction array in trapped Bose-Einstein condensates (2008)
  • Author(s): 笠松健一
  • Organizer: 25th International Conference on Low Temperature Physics
  • Place of Presentation: Amsterdam
  • Year and Date: 2008-08-10
• [Presentation] Uniformly frustrated Josephson junction array in trapped Bose-Einstein condensates (2008)
  • Author(s): K. Kasamatsu
  • Organizer: 25th International Conference on Low Temperature Physics
  • Place of Presentation: Leiden, Amsterdam
• [Presentation] 原子気体BECで実現する一様なフラストレーションをもったジョセフソン接合列 (2008)
  • Author(s): 笠松健一
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学
• [Presentation] 回転2成分ボース凝縮体における渦シート構造 (2008)
  • Author(s): 笠松健一, 坪田誠
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学
• [Presentation] 回転光格子中のボース凝縮体における動的な量子渦相 (2007)
  • Author(s): 笠松健一,坪田誠
  • Organizer: 日本物理学会2007年春季大会
  • Place of Presentation: 鹿児島大学
• [Presentation] Vortex Lattices in Rotating Bose-Einstein Condensate in an Optical Lattice: Analogy to Uniformly Frustrated Josephson Junction Arrays (2007)
  • Author(s): K. Kasamatsu
  • Organizer: International Symposium on Quantum Fluids and Solids 2007
  • Place of Presentation: Kazan State Univ
• [Presentation] Static and Dynamic Properties of Multicomponent Bose-Einstein Condensates of Ytterbium Atoms (2007)
  • Author(s): K. Kasamatsu, M. Tsubota
  • Organizer: International Symposium on Quantum Fluids and Solids 2007
  • Place of Presentation: Kazan State Univ
• [Presentation] Rotating Bose-Einstein condensates in an optical lattice : Analogy to uniformly frustrated Josephson Junction arrays (2007)
  • Author(s): K. Kasamatsu
  • Organizer: BOSE-EINSTEIN CONDENSATION 2007-Frontiers in Quantum Gases
  • Place of Presentation: Sant Feliu de Guixols, Spain
• [Presentation] Dynamical Properties of Vortices in a Bose-Einstein Condensate in a Rotating Lattice (2006)
  • Author(s): Kenichi Kasamatsu, M. Tsubota
  • Organizer: International Symposium on Quantum Fluids and Solids 2006
  • Place of Presentation: Univ. of Kyoto
• [Presentation] Vortex dynamics in Bose-Einstein condensates driven by a rotating optical lattice (2006)
  • Author(s): Kenichi Kasamatsu, M. Tsubota
  • Organizer: International Conference on Quantum Mechanics and Chaos
  • Place of Presentation: Osaka City Univ
• [Remarks]
  • URL: http://qube.phys.kindai.ac.jp/users/kenichi/index.html