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cond-mat.mes-hall2023★ 2 cited
PT-symmetric Non-Hermitian Hopf Metal
Seik Pak, Cheol Hun Yeom, Sonu Verma +1
Hopf insulator is a representative class of three-dimensional topological insulators beyond the standard topological classification methods based on K-theory. In this letter, we di…
cond-mat.str-el2023
Collective non-Hermitian skin effect: Point-gap topology and the doublon-holon excitations in non-reciprocal many-body systems
Beom Hyun Kim, Jae-Ho Han, Moon Jip Park
Open quantum systems provide a plethora of exotic topological phases of matter that has no Hermitian counterpart. Non-Hermitian skin effect, macroscopic collapse of bulk states to…