Japanese Page

Masaya Kunimi

Affiliation : Department of Physics, Tokyo University of Science
Position : Assistant Professor

Tokyo University of Science, Shinjuku, Tokyo,162-8601, Japan


April 2005 - March 2009 Department of Physics, School of Science, Hokkaido University (Undergraduate course)
April 2009 - March 2011 Department of basic science, University of Tokyo (Master course)
April 2011 - March 2014 Department of basic science, University of Tokyo (Doctor course)

Reserch Experience

April 2011 - March 2014, JSPS Research Fellow (DC1)
April 2014 - March 2016, Postdoctoral Fellow at University of Electro-communications, Hiroki Saito's group
April 2016 - March 2019, JSPS Research Fellow (PD) at Kyoto University
April 2019 - March 2022, Postdoctoral Fellow at Institute for Molecular Science, Ohmori group

April 2022 - present, Assitant Professor, Tokyo University of Science, Nikuni group


ORCID, Scopus

Research Interests

Superfluidity, quantum simulation using cold neutral atoms and Rydberg atoms, nonergodic dynamics in isolated quantum systems.
Papers [ Google Scholar ]

1. Masaya Kunimi, Yuki Nagai, and Yusuke Kato, Josephson effects in one-dimensional supersolids, Phys. Rev. B 84, 094521 (2011). [9pages] [ Link ] arXiv:1005.3936 

2. Masaya Kunimi, Michikazu Kobayashi, and Yusuke Kato, Dynamics of one-dimensional supersolids, J. Phys.: Conf. Ser. 400, 012037 (2012). [4pages] (LT26 proceedings) [ Link ]

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

9. Yujiro Eto, Masaya Kunimi, Hidekatsu Tokita, Hiroki Saito, and Takuya Hirano, Suppression of relative flow by multiple domains in two-component Bose-Einstein condensates, Phys. Rev. A 92, 013611 (2015). [5pages] [ Link ] arXiv:1505.04882

10. Yujiro Eto, Masahiro Takahashi, Keita Nabeta, Ryotaro Okada, Masaya Kunimi, Hiroki Saito, and Takuya Hirano, Bouncing motion and penetration dynamics in multicomponent Bose-Einstein condensates, Phys. Rev. A 93, 033615 (2016). [6pages] [ Link ] [ Erratum ] arXiv:1511.01624 See also here.

11. Yujiro Eto, Masahiro Takahashi, Masaya Kunimi, Hiroki Saito, and Takuya Hirano, Non-equilibrium dynamics induced by miscible-immiscible transition in binary Bose-Einstein condensates, New J. Phys. 18, 073029 (2016). [6pages] [ Link ] [ Erratum ] arXiv:1512.01331.

12. Masaya Kunimi and Ippei Danshita, Thermally activated phase slips of one-dimensional Bose gases in shallow optical lattices, Phys. Rev. A 95, 033637 (2017). [11pages] [ Link ] arXiv:1610.08982 [cond-mat.quant-gas]

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]

18. Masaya Kunimi and Ippei Danshita, Nonergodic dynamics of the one-dimensional Bose-Hubbard model with a trapping potential, Phys. Rev. A 104, 043322 (2021). [9pages] [ Link ] arXiv:2108.01238. [cond-mat.quant-gas,cond-mat.stat-mech,quant-ph]

19. Vineet Bharti, Seiji Sugawa, Michiteru Mizoguchi, Masaya Kunimi, Yichi Zhang, Sylvain de Léséleuc, Takafumi Tomita, Titus Franz, Matthias Weidemüller, and Kenji Ohmori, Ultrafast Many-Body Dynamics in an Ultracold Rydberg-Excited Atomic Mott Insulator, arXiv:2201.09590. [cond-mat.quant-gas,physics.atom-ph,quant-ph]

20. Masaya Kunimi and Ippei Danshita, Persistent-current states originating from the Hilbert space fragmentation in momentum space, arXiv:2211.00785. [cond-mat.quant-gas,cond-mat.stat-mech,quant-ph]