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Nonlinearity-induced topological phase transition characterized by the nonlinear Chern number
Kazuki Sone, Motohiko Ezawa, Yuto Ashida +2
As first demonstrated by the characterization of the quantum Hall effect by the Chern number, topology provides a guiding principle to realize robust properties of condensed matter…
Exceptional mode topological surface laser
Kazuki Sone, Yuto Ashida, Takahiro Sagawa
Band topology has been studied as a design principle of realizing robust boundary modes. Here, by exploring non-Hermitian topology, we propose a three-dimensional topological laser…
Exceptional non-Hermitian topological edge mode and its application to active matter
Kazuki Sone, Yuto Ashida, Takahiro Sagawa
Topological materials exhibit edge-localized scattering-free modes protected by their nontrivial bulk topology through the bulk-edge correspondence in Hermitian systems. While topo…
Geometrical Pumping in Quantum Transport: Quantum Master Equation Approach
Tatsuro Yuge, Takahiro Sagawa, Ayumu Sugita +1
For an open quantum system, we investigate the pumped current induced by a slow modulation of control parameters on the basis of the quantum master equation and full counting stati…