8 papers
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…