30 citations · 190 across the 18 of their papers we have counts for
22 papers · 1 filter
symmetry and Berry phase of bosonic ladder
Yoshihito Kuno, Yasuhiro Hatsugai
Bose gas on a two-leg ladder exhibits an interesting topological phase. We show the presence of a bosonic symmetry-protected-topological (SPT) phase protected by sy…
Topological pump and bulk-edge-correspondence in an extended Bose-Hubbard model
Yoshihito Kuno, Yasuhiro Hatsugai
An extended Bose-Hubbard model (EBHM) with three- and four-body constraints can be feasible in cold atoms in an optical lattice. A rich phase structure including various symmetry-p…
Non-thermalized Dynamics of Flat-Band Many-Body Localization
Takahiro Orito, Yoshihito Kuno, Ikuo Ichinose
We find that a flat-band fermion system with interactions and without disorders exhibits non-thermalized ergodicity-breaking dynamics, an analog of many-body localization (MBL). In…
Observation of antiferromagnetic correlations in an ultracold SU() Hubbard model
Shintaro Taie, Eduardo Ibarra-García-Padilla, Naoki Nishizawa +6
Mott insulators are paradigms of strongly correlated physics, giving rise to phases of matter with novel and hard-to-explain properties. Extending the typical SU(2) symmetry of Mot…
Flat Band Quantum Scar
Yoshihito Kuno, Tomonari Mizoguchi, Yasuhiro Hatsugai
We show that a quantum scar state, an atypical eigenstate breaking eigenstate thermalization hypothesis embedded in a many-body energy spectrum, can be constructed in flat band sys…
Interaction induced doublons and embedded topological subspace in a complete flat-band system
Yoshihito Kuno, Tomonari Mizoguchi, Yasuhiro Hatsugai
In this work, we investigate effects of weak interactions on a bosonic complete flat-band system. By employing a band projection method, the flat-band Hamiltonian with weak interac…