Hans-Christoph Kaiser, Hagen Neidhardt, Joachim Rehberg Macroscopic current induced boundary conditions for Schroedinger-type operators (544K, pdf) ABSTRACT. We describe an embedding of a quantum mechanically described structure into a macroscopic flow. The open quantum system is partly driven by an adjacent macroscopic flow acting on the boundary of the bounded spatial domain designated to quantum mechanics. This leads to an essentially non-selfadjoint Schroedinger-type operator, the spectral properties of which will be investigated.