121 citations · 1.2k across the 51 of their papers we have counts for
11 papers · 1 filter
Chiral edge modes in evolutionary game theory: a kagome network of rock-paper-scissors
Tsuneya Yoshida, Tomonari Mizoguchi, Yasuhiro Hatsugai
We theoretically demonstrate the realization of a chiral edge mode in a system beyond natural science. Specifically, we elucidate that a kagome network of rock-paper-scissors (K-RP…
Bulk-edge correspondence in two-dimensional topological semimetals: A transfer matrix study of antichiral edge modes
Tomonari Mizoguchi, Tohru Koma
We study edge modes in topological semimetals which have an energy band structure of ordinary semimetals but can be characterized by a Chern number. More specifically, we focus on…
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…
Square-root topological semimetals
Tomonari Mizoguchi, Tsuneya Yoshida, Yasuhiro Hatsugai
We propose topological semimetals generated by the square-root operation for tight-binding models in two and three dimensions, which we call square-root topological semimetals. The…
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…
Type-III Dirac Cones from Degenerate Directionally Flat Bands: Viewpoint from Molecular-Orbital Representation
Tomonari Mizoguchi, Yasuhiro Hatsugai
We present a systematic method of creating type-III Dirac cones from degenerate directionally flat bands. Here, the directionally flat band means a completely dispersionless band o…
Topological Modes Protected by Chiral and Two-Fold Rotational Symmetry in a Spring-Mass Model with a Lieb Lattice Structure
Hiromasa Wakao, Tsuneya Yoshida, Tomonari Mizoguchi +1
We propose how to realize the topological modes, which correspond to topological zero modes for a quantum system, protected by chiral and rotation symmetry for a mechanical system.…
Field-selective classical spin liquid and magnetization plateaus on kagome lattice
Kunio Tokushuku, Tomonari Mizoguchi, Masafumi Udagawa
We obtain a classical spin liquid (CSL) phase by applying a magnetic field in -- Ising model on a kagome lattice. As we proved in the previous study [Phys. Rev. Lett…
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…
Systematic construction of topological flat-band models by molecular-orbital representation
Tomonari Mizoguchi, Yasuhiro Hatsugai
On the basis of the "molecular-orbital" representation which describes generic flat-band models, we propose a systematic way to construct a class of flat-band models with finite-ra…