Quantum phase transitions and non-equilibrium dynamics of disordered one-dimensional quantum fluids
Project/Area Number |
25800228
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Atomic/Molecular/Quantum electronics
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Research Institution | Kyoto University |
Principal Investigator |
Danshita Ippei 京都大学, 基礎物理学研究所, 助教 (90586950)
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Project Period (FY) |
2013-04-01 – 2016-03-31
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Project Status |
Completed (Fiscal Year 2015)
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Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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Keywords | 冷却気体 / 光格子 / 超流動 / 量子相転移 / Higgsモード / Fano効果 / 孤立波 / 表面臨界現象 / 位相滑り |
Outline of Final Research Achievements |
We have studied the effects of impurities on properties of ultracold quantum gases, such as quantum phase transitions. Our main focus has been placed on single-component and two-component Bose gases, which are precisely controllable in experiments. We have successfully resolved some long-standing problems and found novel phenomena. Specifically, we have proposed a way to experimentally quantify the breakdown of superfluid flow due to quantum phase slips in a system of one-dimensional single-component Bose gases. As for two-component Bose gases in optical lattices, we have found surface critical phenomena caused by impurity potential. Moreover, we consider a relativistic superfluid of single-component Bose gases in optical lattices to predict the existence of a novel elementary excitation, namely the Higgs bound state.
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Report
(4 results)
Research Products
(63 results)
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[Presentation] 一次元超流動体の量子位相滑り2015
Author(s)
段下一平
Organizer
密度行列繰り込み群法における最近の展開
Place of Presentation
兵庫県神戸市中央区理化学研究所計算科学研究機構
Year and Date
2015-08-25
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[Presentation] Opening Remarks2014
Author(s)
Ippei Danshita
Organizer
Higgs Modes in Condensed Matter and Quantum Gases
Place of Presentation
YITP, Kyoto University, Japan
Year and Date
2014-06-23 – 2014-06-25
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[Presentation] Binary Bose mixtures in optical lattices2014
Author(s)
Ippei Danshita
Organizer
International Molecule-type Workshop on New Correlations in Exotic Nuclei and Advances of Theoretical Models
Place of Presentation
Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto, Japan
Related Report
Invited
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[Presentation] First-order transition and hysteresis phenomena of Bose-Bose mixtures in an optical lattice2013
Author(s)
Daisuke Yamamoto, Takeshi Ozaki, Carlos A. R. Sa de Melo, Ippei Danshita
Organizer
2013 Joint Meeting of the APS Division of Atomic, Molecular, and Optical Physics and the CAP Division of Atomic, Molecular, and Optical Physics
Place of Presentation
Quebec City Convention Center, Quebec City, Quebec, Canada
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