A unique feature of non-Hermitian systems is the skin effect, which is the extreme sensitivity to the boundary conditions. In this talk, I show that the skin effect originates from intrinsic non-Hermitian topology, by using the bulk-boundary correspondence of the equivalent Hermitian system. I also discuss a non-Hermitian counterpart of topological insulators/superconductors ― symmetry-protected skin effects. In particular, we discovered the Z2 skin effect protected by time-reversal symmetry in one and two space dimensions [1]. We also categorized which
non-Hermitian topological phases are intrinsic to non-Hermitian systems for any space dimensions and any internal symmetry [1,2].
[1] Nobuyuki Okuma, Kohei Kawabata, Ken Shiozaki, Masatoshi Sato, arXiv:1910.02878.
[2] Ken Shiozaki, in preparation.


連絡教員：物理学系　村上　修一（内線2747）