3. Masaya Kunimi and Yusuke Kato, Mean-field and stability analyses of two-dimensional flowing soft-core bosons modeling a supersolid, Phys. Rev. B 86, 060510(R) (2012). [4pages] [ Link ] arXiv:1205.2126
4. Masaya Kunimi and Yusuke Kato, Precursor Phenomena of Nucleations of Quantized Vortices in the Presence of a Uniformly Moving Obstacle in Bose-Einstein Condensates J. Low Temp. Phys. 175, 201 (2014). [7pages] (Proceedings of QFS2013) [ Link ] arXiv:1305.3995
5. Masaya Kunimi and Yusuke Kato, Metastability, excitations, fluctuations, and multiple-swallowtail structures of a superfluid in a Bose-Einstein condensate in the presence of a uniformly moving defect, Phys. Rev. A 91, 053608 (2015). [15pages] [ Link ] arXiv:1407.7915
6. Masaya Kunimi, Metastable spin textures and Nambu-Goldstone modes of a ferromagnetic spin-1 Bose-Einstein condensate confined in a ring trap, Phys. Rev. A 90, 063632 (2014). [8pages] [ Link ] arXiv:1408.4129
7. Hiroki Saito and Masaya Kunimi, Energy shift of magnons in a ferromagnetic spinor-dipolar Bose-Einstein condensate, Phys. Rev. A 91, 041603(R) (2015). [4pages] [ Link ] arXiv:1502.04161
8. Masaya Kunimi and Hiroki Saito, Upper bound of one-magnon excitation and lower bound of effective mass for ferromagnetic spinor Bose and Fermi gases, Phys. Rev. A 91, 043624 (2015). [6pages] [ Link ] arXiv:1503.03951
13. Masaya Kunimi and Ippei Danshita, Decay mechanisms of superflow of Bose-Einstein condensates in ring traps, Phys. Rev. A 99, 043613 (2019). [9pages] [ Link ] arXiv:1712.09493 [cond-mat.quant-gas]
14. Kazuma Nagao, Masaya Kunimi, Yosuke Takasu, Yoshiro Takahashi, and Ippei Danshita, Semiclassical quench dynamics of Bose gases in optical lattices, Phys. Rev. A 99, 023622 (2019). [11pages] [ Link ] arXiv:1810.04347 [cond-mat.quant-gas]
15. Masaya Kunimi and Ippei Danshita, Non-equilibrium steady states of Bose-Einstein condensates with a local particle loss in double potential barriers, Phys. Rev. A 100, 063617 (2019). [13pages] [ Link ] arXiv:1906.03551. [cond-mat.quant-gas]
16. Michiteru Mizoguchi, Yichi Zhang, Masaya Kunimi, Akira Tanaka, Shuntaro Takeda, Nobuyuki Takei, Vineet Bharti, Kuniaki Koyasu, Tetsuo Kishimoto, Dieter Jaksch, Alexander Glaetzle, Martin Kiffner, Guido Masella, Guido Pupillo, Matthias Weidemüller, and Kenji Ohmori, Ultrafast creation of overlapping Rydberg electrons in an atomic BEC and Mott-insulator lattice, Phys. Rev. Lett. 124, 253201 (2020). [7pages] [ Link ] arXiv:1910.05292 [physics.atom-ph] See also here.
17. Masaya Kunimi, Kazuma Nagao, Shimpei Goto, and Ippei Danshita, Performance evaluation of the discrete truncated Wigner approximation for quench dynamics of quantum spin systems with long-range interactions, Phys. Rev. Research 3, 013060 (2021). [15pages] [ Link ] arXiv:2008.13481. [cond-mat.quant-gas]
Hilbert space fragmentation(HSF)とは近年見つかった新しいnonergodicな現象である。この現象は非自明な保存量によるkinetic constraintsによって引き起こされる。このconstraintによりHilbert空間がシステムサイズの指数関数的に多くのsubsectorに分割され、その結果熱平衡化しないという現象である。本研究では、運動量空間でHSFを引き起こすことで永久流状態を持つような１次元の格子模型の構築に成功した。また、この永久流状態は従来研究されている超流動や超伝導で見られるものとは異なる性質を持つことも示した。
2. Masaya Kunimi, Yuki Nagai, and Yusuke Kato, Superflow of one-dimensional supersolid past an obstacle, PSM 2010, Hamagin Hall "Via Mare", Yokohama, Japan, 2010年3月10日 (ポスター発表)
8. Masaya Kunimi, Michikazu Kobayashi, and Yusuke Kato, Dynamics of one-dimensional supersolid, UCAM 2011, Koshiba Hall, The University of Tokyo, Tokyo, Japan, 2011年1月24日 (ポスター発表)
12. 穴釜剛, 國見昌哉, 加藤雄介, Supersolidity in Two-dimensional supersolids in the presence of an obstacle, ISSP短期研究会「量子凝縮系におけるdefectとtopology」 (発表者:穴釜剛), 東京大学物性研究所, 2012年1月5日 (ポスター発表)
23. Masaya Kunimi and Yusuke Kato, Stability analysis of two-dimensional Bose-Einstein condensates in the presence of a Gaussian potential, 44th Annual DAMOP Meeting, Quebec City, Quebec, Canada, 2013年6月5日 (口頭発表)
24. Masaya Kunimi and Yusuke Kato, Stability analysis of two-dimensional Bose-Einstein condensates in the presence of a Gaussian potential, STATPHYS25, Seoul, Korea, 2013年7月25日 (ポスター発表)
25. Masaya Kunimi and Yusuke Kato, Precursor phenomena of nucleations of quantized vortices in the presence of a uniformly moving obstacle in Bose-Einstein condensates, QFS2013, 松江, 2013年8月3日 (ポスター発表)
27. 國見昌哉, 加藤雄介, Precursor phenomena of nucleations of quantized vortices in the presence of a uniformly moving obstacle in Bose-Einstein condensates, 第58回物性若手夏の学校, 滋賀, 2013年8月15日 (ポスター発表)
30. Masaya Kunimi, Metastable Spin Textures and Excitations of Spin-1 Bose-Einstein
Condensates in a Ring Trap, Higgs modes in condensed matter and quantum gases, 京都大学基礎物理学研究所, 2014年6月24日 (ポスター発表)
31. Masaya Kunimi, Metastable Spin Textures of Spin-1 Bose-Einstein
Condensates in a Ring Trap, ICAP2014, Mayflower renaissance Hotel, Washington D. C., America, 2014年8月4日 (ポスター発表)
37. Masaya Kunimi and Hiroki Saito, Magnon Excitations in Spinor Cold Atomic Gases, QFS2015, The Conference and Event Center Niagara Falls, Niagara Falls, NY, America, 2015年8月13〜14日 (ポスター発表)
38. Masaya Kunimi and Hiroki Saito, Magnon Excitations in Spinor Cold Atomic Gases, SFS2015, 京都大学芝蘭会館, 2015年8月22日 (ポスター発表)
50. Masaya Kunimi and Ippei Danshita, Thermally activated phase slips of a Bose-Einstein condensate in a ring trap, 48th Annual DAMOP Meeting, Sacramento, America, 2017年6月8日 (口頭発表)
55. Masaya Kunimi and Ippei Danshita, Study of decay of superflow of a Bose-Einstein condensate in a ring trap, FINESS2018, Wanaka, New Zealand, 2018年2月21日 (ポスター発表)
58. Masaya Kunimi and Ippei Danshita, Can the truncated-Wigner approximation correctly describe thermal and quantum phase slips in one-dimensional Bose gases?, QFS2018, 東京大学本郷キャンパス, 2018年7月30日 (ポスター発表)
77. Masaya Kunimi, Study of novel quantum many-body phenomena originating from non-ergodicity in isolated quantum systems, Second Annual Meeting(Extereme Universe) , 神戸コンベンションセンター、国際会議場 2022年12月27日 (口頭発表)
81. Masaya Kunimi, Ippei Danshita, Persistent-current states originating from the Hilbert space fragmentation in momentum space, STATPHYS28, 東京大学本郷キャンパス, 2023年8月7日 (口頭発表)
88. Kanto Miyazako, Masaya Kunimi, Tetsuro Nikuni, Effects of the particle number conservation law for Family-Vicsek scaling in one-dimensional quantum systems, ExU-YITP Workshop on Condensed Matter Physics and Quantum Information, 京都大学基礎物理学研究所, 2023年9月26日 (ポスター発表、発表者：Kanto Miyazako)
89. Kantaro Honda, Yosuke Takasu, Hironori Kazuta, Masaya Kunimi, Shimpei Goto, Ippei Danshita, Yoshiro Takahashi, Quantum simulation of non-ergodic behavior in a disorder-free Bose-Hubbard system, ExU-YITP Workshop on Condensed Matter Physics and Quantum Information, 京都大学基礎物理学研究所, 2023年9月28日 (ポスター発表、発表者：Hironori Kazuta)
12. Proposal for realization of the quantum-spin chain with Dzyaloshinskii-Moriya interaction using Rydberg atom quantum simulators, Kindai QTP Seminars, 近畿大学、量子多体物理研究室 2022年12月21日
