Topological aspects of non-Hermitian skin effects
Masatoshi Sato, Kyoto University
Whereas the Hamiltonian is usually supposed to be Hermitian, it can be non-Hermitian by coupling to environments. In this talk, I discuss a possible generalization of topological phases in the presence of non-Hermiticity. In particular, I reveal topological aspects of non-Hermitian skin effects-a state accumulation intrinsic to non-Hermitian systems- and argue related non-perturbative phenomena.
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 K. Kawabata, K. Shiozaki, M. Ueda, M. Sato, Phys. Rev. X9, 041015 (2019).
 N. Okuma, K. Kawabata, K. Shiozaki, M. Sato, Phys. Rev. Lett. 124, 086801 (2020).
 N. Okuma, M. Sato, arXiv:2205.10379.