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Discriminant indicators with generalized inversion symmetry
Tsuneya Yoshida, Ryo Okugawa, Yasuhiro Hatsugai
We propose indicators of the discriminant for systems with generalized inversion symmetry which are computed from data only at high-symmetry points in the Brillouin zone. Our appro…
Topological d-wave superconductivity in two dimensions
Youichi Yanase, Akito Daido, Kazuaki Takasan +1
Despite intensive searches for topological superconductors, the realization of topological superconductivity remains under debate. Previous proposals for the topological -wave,…
Non-Hermitian topology in rock-paper-scissors games
Tsuneya Yoshida, Tomonari Mizoguchi, Yasuhiro Hatsugai
Non-Hermitian topology is a recent hot topic in condensed matters. In this paper, we propose a novel platform drawing interdisciplinary attention: rock-paper-scissors (RPS) cycles…
Surface exceptional points in a topological Kondo insulator
Robert Peters, Kazuhiro Kimura, Yoshihiro Michishita +2
Correlated materials have appeared as an arena to study non-Hermitian effects as typically exemplified by the emergence of exceptional points. We show here that topological Kondo i…
Dynamics governed by symmetry-protected exceptional rings for mechanical systems
Gen Najima, Tsuneya Yoshida, Yasuhiro Hatsugai
Non-Hermitian topological phenomena occur in mechanical systems described by the Newton equation. A mechanical graphene, which is composed of mass points and springs, shows symmetr…
Edge states of a diffusion equation in one dimension: Rapid heat conduction to the heat bath
S. Makino, T. Fukui, T. Yoshida +1
We propose a one-dimensional (1D) diffusion equation (heat equation) for systems in which the diffusion constant (thermal diffusivity) varies alternately with a spatial period .…