1.1k citations · 1.6k across the 15 of their papers we have counts for
15 papers
Quasiperiodicity-induced non-Hermitian skin effect from the breakdown of scale-free localization
Kazuma Saito, Ryo Okugawa, Kazuki Yokomizo +2
Non-reciprocal systems exhibit extreme sensitivity to boundary conditions, typically manifesting as the non-Hermitian skin effect (NHSE) under open boundaries. By bridging the boun…
Non-Bloch band theory of generalized eigenvalue problems
Kazuki Yokomizo, Taiki Yoda, Yuto Ashida
Waves in a variety of fields in physics, such as mechanics, optics, spintronics, and nonlinear systems, obey generalized eigenvalue equations. To study non-Hermitian physics of tho…
Optical non-Hermitian skin effect in two-dimensional uniform media
Taiki Yoda, Yuto Moritake, Kenta Takata +3
The non-Hermitian skin effect (NHSE) is a novel localization phenomenon in certain non-Hermitian systems with gain and/or loss. Most of previous works study the non-Hermitian skin…
Non-Hermitian physics of levitated nanoparticle array
Kazuki Yokomizo, Yuto Ashida
The ability to control levitated nanoparticles allows one to explore various fields of physics, including quantum optics, quantum metrology, and nonequilibrium physics. It has been…
Non-Bloch bands in two-dimensional non-Hermitian systems
Kazuki Yokomizo, Shuichi Murakami
The non-Bloch band theory can describe energy bands in a one-dimensional (1D) non-Hermitian system. On the other hand, whether the non-Bloch band theory can be extended to higher-d…
Non-Hermitian waves in a continuous periodic model and application to photonic crystals
Kazuki Yokomizo, Taiki Yoda, Shuichi Murakami
In some non-Hermitian systems, the eigenstates in the bulk are localized at the boundaries of the systems. This is called the non-Hermitian skin effect, and it has been studied mos…
Scaling rule in critical non-Hermitian skin effect
Kazuki Yokomizo, Shuichi Murakami
Non-Hermitian systems show a non-Hermitian skin effect, where the bulk states are localized at a boundary of the systems with open boundary conditions. In this paper, we study depe…
Non-Hermitian band topology with generalized inversion symmetry
Ryo Okugawa, Ryo Takahashi, Kazuki Yokomizo
Non-Hermitian skin effects and exceptional points are topological phenomena characterized by integer winding numbers. In this study, we give methods to theoretically detect skin ef…
Non-Bloch band theory in bosonic Bogoliubov-de Gennes systems
Kazuki Yokomizo, Shuichi Murakami
In recent research, it has been shown that non-Hermitian systems exhibit sensitivity to boundaries, and it is caused by the non-Hermitian skin effect. In this work, we construct th…
Non-Bloch band theory and bulk-edge correspondence in non-Hermitian systems
Kazuki Yokomizo, Shuichi Murakami
In this paper, we review our non-Bloch band theory in one-dimensional non-Hermitian tight-binding systems. In our theory, it is shown that in non-Hermitian systems, the Brillouin z…
Second-order topological non-Hermitian skin effects
Ryo Okugawa, Ryo Takahashi, Kazuki Yokomizo
Higher-order topology realizes topologically robust corner modes as a manifestation of nontriviality. We theoretically propose non-Hermitian skin effects which stem from second-ord…
Topological semimetal phase with exceptional points in one-dimensional non-Hermitian systems
Kazuki Yokomizo, Shuichi Murakami
Energy bands of non-Hermitian crystalline systems are described in terms of the generalized Brillouin zone (GBZ) having unique features which are absent in Hermitian systems. In th…
Non-Bloch Band Theory of Non-Hermitian Systems
Kazuki Yokomizo, Shuichi Murakami
In spatially periodic Hermitian systems, such as electronic systems in crystals, the band structure is described by the band theory in terms of the Bloch wave functions, which repr…
Nodal-line semimetal superlattices
Kazuki Yokomizo, Hiroaki Yamada, Shuichi Murakami
Spatial modulations, such as multilayers, to realize topological materials have recently been studied in theoretical and experimental works. In this paper, we investigate propertie…
Topological Phases in a Weyl Semimetal Multilayer
Kazuki Yokomizo, Shuichi Murakami
We investigate multilayer systems of a normal insulator and a Weyl semimetal. We calculate the bulk band structure and determine phase diagrams by changing the thickness of the nor…