12 papers
Extracting Boundary Conformal Data from Periodic Non-Hermitian Critical Chains
Yifan Liu, Haruki Shimizu, Dongchang Liu +1
Boundary conformal field theory (BCFT) contains universal data that are usually accessed microscopically by imposing spatial boundaries on the lattice. In non-Hermitian many-body s…
Quantum geometry of the non-Hermitian skin effect
Ken-Ichiro Imura, Kohei Kawabata
The non-Hermitian skin effect is nonreciprocity-induced localization phenomena in which a macroscopic number of eigenstates accumulate anomalously at the boundary, accompanied by t…
Quantum walk with a local spin interaction
Manami Yamagishi, Naomichi Hatano, Kohei Kawabata +4
We introduce a model of quantum walkers interacting with a magnetic impurity localized at the origin. First, we study a model of a single quantum walker interacting with a localize…
Non-Hermitian Disordered Systems
Kohei Kawabata, Shinsei Ryu
Non-Hermitian disordered systems have emerged as a central arena in modern physics, with ramifications spanning condensed matter, quantum, statistical, and high energy contexts. Th…
Exceptional second-order topological insulators
Yutaro Tanaka, Daichi Nakamura, Ryo Okugawa +1
Point-gap topological phases of non-Hermitian systems exhibit exotic boundary states that have no counterparts in Hermitian systems. Here, we develop classification of second-order…
Hopf Bifurcation of Nonlinear Non-Hermitian Skin Effect
Kohei Kawabata, Daichi Nakamura
The non-Hermitian skin effect, nonreciprocity-induced anomalous localization of an extensive number of eigenstates, represents a hallmark of non-Hermitian topological systems with…