4 papers
Nonlinear Frequency-Momentum Topology and Doubling of Multifold Exceptional Points
Tsuneya Yoshida
Even in the linear limit, the topology of multifold (also called higher-order) exceptional points across the Brillouin zone has lacked a general characterization, leaving the doubl…
Interaction-Enabled Two- and Three-Fold Exceptional Points
Musashi Kato, Tsuneya Yoshida
We propose a novel type of exceptional points, dubbed interaction-enabled -fold exceptional points [EPs ()] -- EPs protected by topology that are prohibited at the…
Liouvillian skin effects in two-dimensional electron systems at finite temperatures
Yuta Shigedomi, Tsuneya Yoshida
Liouvillian skin effects, manifested as the localization of Liouvillian eigenstates around the boundary, are distinctive features of non-Hermitian systems and are particularly nota…
Topological photonics of generalized and nonlinear eigenvalue equations
Takuma Isobe, Tsuneya Yoshida, Yasuhiro Hatsugai
Topological photonics is developed based on the analogy of Schrödinger equation which is mathematically reduced to a standard eigenvalue equation. Notably, several photonic system…