Research Achievements - Original paper -

Observation of bulk-edge correspondence in topological pumping based on a tunable electric circuit

Kenichi Yatsugi, Tsuneya Yoshida, Tomonari Mizoguchi, Yoshihito Kuno, Hideo Iizuka, Yukihiro Tadokoro, and Yasuhiro Hatsugai

Communications Physics ( Springer Nature )  5 ( 180 )   2022.07  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

Deformation of localized states and state transitions in systems of randomly hopping interacting fermions

Takahiro Orito, Yoshihito Kuno, Ikuo Ichinose

Physical Review B   105   094201   2022.03  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

Construction of interacting flat-band models by molecular-orbital representation: Correlation functions, energy gap, and entanglement

Tomonari Mizoguchi, Yoshihito Kuno, Yasuhiro Hatsugai

Progress of Theoretical and Experimental Physics   2022 ( 2 )   2022.01  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

Bulk-edge correspondence in the adiabatic heuristic principle

Koji Kudo, Yoshihito Kuno, and Yasuhiro Hatsugai

Physical Review B (Letter)   104   L241113   2021.12  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

Interplay and competition between disorder and flat band in an interacting Creutz ladder

Takahiro Orito, Yoshihito Kuno, Ikuo Ichinose

Physical Review B ( American Physical Society (APS) )  104 ( 9 ) 094202   2021.09  [Refereed]

Research paper (journal)  

DOI

Topological pump and bulk-edge-correspondence in an extended Bose-Hubbard model

Yoshihito Kuno, Yasuhiro Hatsugai

Physical Review B ( American Physical Society (APS) )  104 ( 12 ) 125146   2021.09  [Refereed]

Research paper (journal)  

DOI

Flat band, spin-1 Dirac cone, and Hofstadter diagram in the fermionic square kagome model

Tomonari Mizoguchi, Yoshihito Kuno, Yasuhiro Hatsugai

Physical Review B ( American Physical Society (APS) )  104 ( 3 ) 035161   2021.07  [Refereed]

Research paper (journal)  

DOI

Plateau transitions of a spin pump and bulk-edge correspondence

Yoshihito Kuno, Yasuhiro Hatsugai

Physical Review B ( American Physical Society (APS) )  104 ( 4 ) 045113   2021.07  [Refereed]

Research paper (journal)  

DOI

Square-root topological phase with time-reversal and particle-hole symmetry

Tsuneya Yoshida, Tomonari Mizoguchi, Yoshihito Kuno, Yasuhiro Hatsugai

Physical Review B ( American Physical Society (APS) )  103 ( 23 ) 235130   2021.06  [Refereed]

Research paper (journal)  

DOI

Flat-band full localization and symmetry-protected topological phase on bilayer lattice systems

Ikuo Ichinose, Takahiro Orito, Yoshihito Kuno

Physical Review B ( American Physical Society (APS) )  103 ( 18 ) 184113   2021.05  [Refereed]

Research paper (journal)  

DOI

Competition and interplay between topology and quasi-periodic disorder in Thouless pumping of ultracold atoms

Shuta Nakajima, Nobuyuki Takei, Keita Sakuma, Yoshihito Kuno, Pasquale Marra, Yoshiro Takahashi

Nature Physics ( Springer Science and Business Media LLC )  17   844   2021.04  [Refereed]

Research paper (journal)  

DOI

Nonthermalized dynamics of flat-band many-body localization

Takahiro Orito, Yoshihito Kuno, Ikuo Ichinose

Physical Review B (Letter) ( American Physical Society (APS) )  103 ( 6 ) L060301   2021.02  [Refereed]

Research paper (journal)  

DOI

Detecting Bulk Topology of Quadrupolar Phase from Quench Dynamics

Tomonari Mizoguchi, Yoshihito Kuno, Yasuhiro Hatsugai

Physical Review Letters ( American Physical Society (APS) )  126 ( 1 ) 016802   2021.01  [Refereed]

Research paper (journal)  

DOI

Flat band quantum scar

Yoshihito Kuno, Tomonari Mizoguchi, Yasuhiro Hatsugai

Physical Review B (Rapid communications) ( American Physical Society (APS) )  102 ( 24 ) 241115 (R)   2020.12  [Refereed]

Research paper (journal)  

DOI

Interaction-induced doublons and embedded topological subspace in a complete flat-band system

Yoshihito Kuno, Tomonari Mizoguchi, Yasuhiro Hatsugai

Physical Review A ( American Physical Society (APS) )  102 ( 6 ) 063325   2020.12  [Refereed]

Research paper (journal)  

DOI

Interaction-induced topological charge pump

Yoshihito Kuno, Yasuhiro Hatsugai

Physical Review Research (Rapid communication) ( American Physical Society (APS) )  2 ( 4 ) 042024   2020.10  [Refereed]

Research paper (journal)  

DOI

Square-root higher-order topological insulator on a decorated honeycomb lattice

Tomonari Mizoguchi, Yoshihito Kuno, Yasuhiro Hatsugai

Physical Review A ( American Physical Society (APS) )  102 ( 3 )   2020.04  [Refereed]

Research paper (journal)  

Square-root topological insulators are recently-proposed intriguing
topological insulators, where the topologically nontrivial nature of Bloch wave
functions is inherited from the square of the Hamiltonian. In this paper, we
propose that higher-order topological insulators can also have their
square-root descendants, which we term square-root higher-order topological
insulators. There, emergence of in-gap corner states is inherited from the
squared Hamiltonian which hosts higher-order topology. As an example of such
systems, we investigate the tight-binding model on a decorated honeycomb
lattice, whose squared Hamiltonian includes a breathing kagome-lattice model, a
well-known example of higher-order topological insulators. We show that the
in-gap corner states appear at finite energies, which coincides with the
non-trivial bulk polarization. We further show that the existence of in-gap
corner states results in characteristic single-particle dynamics, namely,
setting the initial state to be localized at the corner, the particle stays at
the corner even after a long time. Such characteristic dynamics may
experimentally be detectable in photonic crystals.

DOI

Exact projector Hamiltonian, local integrals of motion, and many-body localization with topological order

Takahiro Orito, Yoshihito Kuno, Ikuo Ichinose

Physical Review B   101   224308   2020.04  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

PT-symmetric non-Hermitian quantum many-body system using ultracold atoms in an optical lattice with controlled dissipation

Yosuke Takasu, Tomoya Yagami, Yuto Ashida, Ryusuke Hamazaki, Yoshihito Kuno, Yoshiro Takahashi

Progress of Theoretical and Experimental Physics   ptaa   094   2020.04  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

Extended flat-bands, entanglement and topological properties in a Creutz ladder

Yoshihito Kuno

Physical Review B   101   184112   2020.01  [Refereed]

Research paper (journal)   Single author

DOI