Gian Michele Graf
Location
Rennes
Date and time

Conference  DimaScat : Scattering Theory and Spectral Asymptotics of Differential Operators  in Honour of Dimitri Yafaev
Topological insulators are materials, which are conducting at their edges, though not in the bulk. Their characteristic physical properties are reflected by an index, associated to the Hamiltonian. By a general principle, known as bulkedge duality, the index can be defined either in terms of the bulk or the edge Hamiltonian. Among various ways of establishing that duality as a theorem, one is by scattering theory, and in fact by Levinson's theorem.