7 citations · 14 across the 8 of their papers we have counts for
4 papers · 1 filter
On the unitary equivalence of absolutely continuous parts of self-adjoint extensions
Mark M. Malamud, Hagen Neidhardt
The classical Weyl-von Neumann theorem states that for any self-adjoint operator in a separable Hilbert space there exists a (non-unique) Hilbert-Schmidt operator…
Finite Rank Perturbations, Scattering Matrices and Inverse Problems
Jussi Behrndt, Mark M. Malamud, Hagen Neidhardt
In this paper the scattering matrix of a scattering system consisting of two selfadjoint operators with finite dimensional resolvent difference is expressed in terms of a matrix Ne…
Trace formulae for dissipative and coupled scattering systems
Jussi Behrndt, Mark M. Malamud, Hagen Neidhardt
For scattering systems consisting of a (family of) maximal dissipative extension(s) and a selfadjoint extension of a symmetric operator with finite deficiency indices, the spectral…
Scattering Theory for Open Quantum Systems
J. Behrndt, M. M. Malamud, H. Neidhardt
Quantum systems which interact with their environment are often modeled by maximal dissipative operators or so-called Pseudo-Hamiltonians. In this paper the scattering theory for s…