First-order transition with an anomalous hysteresis behavior

• Project/Area Number: 23840054
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: The Institute of Physical and Chemical Research
• Principal Investigator: YAMAMOTO Daisuke 独立行政法人理化学研究所, 古崎物性理論研究室, 基礎科学特別研究員 (80603505)
• Project Period (FY): 2011 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000); Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 一次相転移 / 履歴現象 / 冷却原子気体 / 光格子 / ボース・アインシュタイン凝縮 / 量子スピン系 / スピン二量体 / 磁性体 / 冷却気体 / 冷却Bose気体 / 光学格子 / リエントラント一次相転移 / 異常な履歴現象

Research Abstract

We studied an anomalous hysteresis behavior in first-order transitions. In contrast to a conventional hysteresis process, the hysteresis trajectory of the anomalous hysteresis does not form a loop structure and the phase transition occurs only in a unidirectional way. We revealed the required conditions for the anomalous hysteresis through complementary studies on ultracold atomic gases and quantum spin systems.

Research Products

• [Journal Article] Quantum phases of hardcore bosons with long-range interactions on a square lattice (2012)
  • Author(s): Daisuke Yamamoto, Akiko Masaki, and Ippei Danshita
  • Journal Title: Physical Review B (American Physical Society) Volume: Vol. 86 Pages: 54516-54516
  • Peer Reviewed
• [Journal Article] Anomalous hysteretic behavior in a system of dipolar Bose gases (2012)
  • Author(s): Daisuke Yamamoto, Ippei Danshita, and Carlos A. R. Sa de Melo
  • Journal Title: Journal of Physics: Conference Series (IOP Publishing Ltd) Volume: Vol. 400 Pages: 12083-12083
  • Peer Reviewed
• [Journal Article] Dipolar bosons in triangular optical lattices: Quantum phase transitions and anomalous hysteresis (2012)
  • Author(s): Daisuke Yamamoto, Ippei Danshita, and Carlos A. R. Sa de Melo
  • Journal Title: Physical Review A (American Physical Society) Volume: Vol. 85
  • Peer Reviewed
• [Journal Article] Dipolar bosons in triangular optical lattices: Quantum phase transitions and anomalous hysteresis (2012)
  • Author(s): Daisuke Yamamoto
  • Journal Title: Physical Review A Volume: 85 Issue: 2
  • DOI: 10.1103/physreva.85.021601
  • Peer Reviewed
• [Journal Article] Quantum phases of hardcore bosons with long-range interactions on a square lattice (2012)
  • Author(s): Daisuke Yamamoto
  • Journal Title: Physical Review B Volume: 86 Issue: 5 Pages: 54516-54516
  • DOI: 10.1103/physrevb.86.054516
  • Peer Reviewed
• [Journal Article] Anomalous hysteretic behavior in a system of dipolar Bose gases (2012)
  • Author(s): Daisuke Yamamoto
  • Journal Title: Journal of Physics: Conference Series Volume: 400 Issue: 1 Pages: 12083-12083
  • DOI: 10.1088/1742-6596/400/1/012083
  • Peer Reviewed
• [Journal Article] Anomalous hysteretic behavior in a system of dipolar Bose gases
  • Author(s): Daisuke Yamamoto、Ippei Danshita、C.A.R.Sa de Melo
  • Journal Title: Journal of Physics : Conference Series Volume: (in print)
  • Peer Reviewed
• [Presentation] 光格子中のBose 混合気体における超流動-Mott 絶縁体一次転移と履歴現象 (2013)
  • Author(s): 山本大輔,尾崎剛,Carlos A. R. Sa de Melo,段下一平
  • Organizer: 日本物理学会第68回年次大会、29aEE-1
  • Place of Presentation: 広島大学
  • Year and Date: 2013-03-29
• [Presentation] Supersolids and Anomalous Hysteresis in Frustrated Spin-Dimer Model (2013)
  • Author(s): Daisuke Yamamoto and Ippei Danshita
  • Organizer: The APS March Meeting, F15.3
  • Place of Presentation: Baltimore, USA
  • Year and Date: 2013-03-19
• [Presentation] Supersolids and Anomalous Hysteresis in Frustrated Spin-Dimer Model (2013)
  • Author(s): Daisuke Yamamoto
  • Organizer: The APS March Meeting
  • Place of Presentation: Baltimore, USA
• [Presentation] 光格子中のBose混合気体における超流動-Mott絶縁体一次転移と履歴現象 (2013)
  • Author(s): 山本大輔
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学
• [Presentation] スピン二量体化合物における超固体相と異常な履歴現象 (2012)
  • Author(s): 山本 大輔, 段下 一平
  • Organizer: 日本物理学会秋季大会、20pAC-11
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2012-09-20
• [Presentation] Anomalous hysteresis of Bose gases in an optical lattice (2012)
  • Author(s): Daisuke Yamamoto, Ippei Danshita, and Carlos A. R. Sa de Melo
  • Organizer: Workshop on Quantum Simulations with Ultracold Atoms
  • Place of Presentation: Trieste, Italy
  • Year and Date: 2012-07-30
• [Presentation] Quantum phases and anomalous hysteresis of dipolar Bose gases in a triangular optical lattice (2012)
  • Author(s): Daisuke Yamamoto, Ippei Danshita, and Carlos A. R. Sa de Melo
  • Organizer: The 23rd International Conference on Atomic Physics (ICAP2012), Mo-079
  • Place of Presentation: Palaiseau, France
  • Year and Date: 2012-07-23
• [Presentation] Re-entrant first-order phase transitions and anomalous hysteresis of dipolar Bose gases in a triangular optical lattice (2012)
  • Author(s): Daisuke Yamamoto, Ippei Danshita, and Carlos A. R. Sa de Melo
  • Organizer: The APS March Meeting, D4.15
  • Place of Presentation: Boston, USA
  • Year and Date: 2012-02-27
• [Presentation] Re-entrant first-order phase transitions and anomalous hysteresis of dipolar Bose gases in a triangular optical lattice (2012)
  • Author(s): Daisuke Yamamoto、Ippei Danshita、C.A.R.Sa de Melo
  • Organizer: The APS March Meeting
  • Place of Presentation: Boston, MA, USA
  • Year and Date: 2012-02-27
• [Presentation] 光学格子中Bose 気体のリエントラント一次相転移における異常な履歴現象 (2012)
  • Author(s): 山本 大輔, 段下 一平, Carlos A. R. Sa de Melo
  • Organizer: Ultracold Gases: Superfluidity and Strong Correlations (USS-2012)、B-3
  • Place of Presentation: 東京理科大学
  • Year and Date: 2012-01-12
• [Presentation] 光学格子中Bose気体のリエントラント一次相転移における異常な履歴現象 (2012)
  • Author(s): 山本大輔、段下一平、C.A.R.Sa de Melo
  • Organizer: Ultracold Gases : Superfluidity and Strong Corrplations
  • Place of Presentation: 東京理科大学森戸記念会館(東京都)(招待講演)
  • Year and Date: 2012-01-12
• [Presentation] Quantum phases and anomalous hysteresis of dipolar Bose gases in a triangular optical lattice (2012)
  • Author(s): Daisuke Yamamoto
  • Organizer: The 23rd International Conference on Atomic Physics
  • Place of Presentation: Palaiseau, France
• [Presentation] スピン二量体化合物における超固体相と異常な履歴現象 (2012)
  • Author(s): 山本 大輔
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 横浜国立大学
• [Presentation] 光格子中のBose 気体における異常な履歴現象 (2011)
  • Author(s): 山本 大輔, 段下 一平
  • Organizer: 日本物理学会秋季大会、21pEE-2
  • Place of Presentation: 富山大学
  • Year and Date: 2011-09-21
• [Presentation] 光格子中のBose気体における異常な履歴現象 (2011)
  • Author(s): 山本大輔、段下一平
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学(富山県)
  • Year and Date: 2011-09-21
• [Presentation] Anomalous hysteretic behavior in a system of dipolar Bose gases (2011)
  • Author(s): Daisuke Yamamoto, Ippei Danshita, and Carlos A. R. Sa de Melo
  • Organizer: 26th International Conference on Low Temperature Physics (LT26), 12P-A011
  • Place of Presentation: Beijing, China
  • Year and Date: 2011-08-12
• [Remarks]
  • URL: https://sites.google.com/site/daisukeyamamoto624/