102 citations · 1.4k across the 61 of their papers we have counts for
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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…
Detecting Bulk Topology of Quadrupolar Phase from Quench Dynamics
Tomonari Mizoguchi, Yoshihito Kuno, Yasuhiro Hatsugai
Direct measurement of a bulk topological observable in topological phase of matter has been a long-standing issue. Recently, detection of bulk topology through quench dynamics has…
Interaction Induced Topological Charge Pump
Yoshihito Kuno, Yasuhiro Hatsugai
Based on a topological transition of the symmetry protected topological phase (SPT), an interaction induced topological charge pump (iTCP) is proposed with the symmetry breaking pa…
Competition and interplay between topology and quasi-periodic disorder in Thouless pumping of ultracold atoms
Shuta Nakajima, Nobuyuki Takei, Keita Sakuma +3
Robustness against perturbations lies at the heart of topological phenomena. If, however, a perturbation such as disorder becomes dominant, it may cause a topological phase transit…
Exact projector Hamiltonian, local integrals of motion, and many-body localization with topological order
Takahiro Orito, Yoshihito Kuno, Ikuo Ichinose
In this work, we construct an exact projector Hamiltonian with interactions, which is given by a sum of mutually commuting operators called stabilizers. The model is based on the r…
PT-symmetric non-Hermitian quantum many-body system using ultracold atoms in an optical lattice with controlled dissipation
Yosuke Takasu, Tomoya Yagami, Yuto Ashida +3
We report our realization of a parity-time (PT) symmetric non-Hermitian many-body system using cold atoms with dissipation. After developing a theoretical framework on PT-symmetric…
Square-root higher-order topological insulator on a decorated honeycomb lattice
Tomonari Mizoguchi, Yoshihito Kuno, Yasuhiro Hatsugai
Square-root topological insulators are recently-proposed intriguing topological insulators, where the topologically nontrivial nature of Bloch wave functions is inherited from the…
Effects of power-law correlated disorders in XXZ spin chain: Many-body localized to thermal phase transition and its critical regime
Takahiro Orito, Yoshihito Kuno, Ikuo Ichinose
We study a canonical many-body-localized (MBL) system with power-law-correlated disorders: spin chain in a random magnetic field. The power-law-correlated disorder…
Extended flat-bands, entanglement and topological properties in a Creutz ladder
Yoshihito Kuno
In this work, we study the entanglement and topological properties of an extended flat-band Creutz ladder by considering a compacted localized state (CLS). Based on the CLS picture…