Publications (20)
A new model for quantum dot light emitting-absorbing devices
Hagen Neidhardt, Lukas Wilhelm, Valentin Zagrebnov
Point contacts and boundary triples
Vladimir Lotoreichik, Hagen Neidhardt, Igor Yu. Popov
The effect of time-dependent coupling on non-equilibrium steady states
Horia D. Cornean, Hagen Neidhardt, Valentin A. Zagrebnov
Convergence rate estimates for Trotter product approximations of solution operators for non-autonomous Cauchy problems
Hagen Neidhardt, Artur Stephan, Valentin A. Zagrebnov
Schrödinger operators with concentric $δ$-shells
Sergio Albeverio, Aleksey Kostenko, Mark Malamud +1
A Kohn-Sham system at zero temperature
Horia Cornean, Kurt Hoke, Hagen Neidhardt +2
A trace formula for functions of contractions and analytic operator Lipschitz functions
Mark Malamud, Hagen Neidhardt, Vladimir Peller
On the unitary equivalence of absolutely continuous parts of self-adjoint extensions
Mark M. Malamud, Hagen Neidhardt
Linear non-autonomous Cauchy problems and evolution semigroups
Hagen Neidhardt, Valentin A. Zagrebnov
Scattering matrices and Weyl functions
Jussi Behrndt, Mark M. Malamud, Hagen Neidhardt
Trace formulae for dissipative and coupled scattering systems
Jussi Behrndt, Mark M. Malamud, Hagen Neidhardt
Perturbation determinants and trace formulas for singular perturbations
Mark M. Malamud, Hagen Neidhardt
Cayley transform applied to non-interacting quantum transport
Horia D. Cornean, Hagen Neidhardt, Lukas Wilhelm +1
Remarks on the operator-norm convergence of the Trotter product formula
Hagen Neidhardt, Artur Stephan, Valentin A. Zagrebnov
Classical solutions of drift-diffusion equations for semiconductor devices: the 2d case
Hans-Christoph Kaiser, Hagen Neidhardt, Joachim Rehberg
Sturm-Liouville boundary value problems with operator potentials and unitary equivalence
Mark Malamud, Hagen Neidhardt
Scattering matrices and Dirichlet-to-Neumann maps
Jussi Behrndt, Mark M. Malamud, Hagen Neidhardt
On the spectrum of the lattice spin-boson Hamiltonian for any coupling: 1D case
Mukhiddin Muminov, Hagen Neidhardt, Tulkin Rasulov
Finite Rank Perturbations, Scattering Matrices and Inverse Problems
Jussi Behrndt, Mark M. Malamud, Hagen Neidhardt
Trotter-Kato product formula for unitary groups
Pavel Exner, Hagen Neidhardt