WIAS Preprint No. 737, (2002)

Dissipative Schrödinger-type operator as a model for generation and recombination


  • Baro, Michael
  • Neidhardt, Hagen

2010 Mathematics Subject Classification

  • 47B44 47E05 47A20 47A55


  • open quantum system, dissipative Schroedinger operator, delta perturbation, dilation, characteristic function, generalized eigenfunctions, carrier and current densities, density matrix


Non-selfadjoint operators play an important role in the modeling of open quantum systems. We consider a one-dimensional Schroedinger-type operator with dissipative boundary conditions and dissipative delta potentials. An explicit description of the characteristic function, the minimal dilation and the generalized eigenfunctions of the dilation is given. The quantities of carrier and current densities are rigorously defined. Furthermore we will show that the current is not constant and that the variation of the current depend essentially on the chosen density matrix and imaginary parts of the delta potentials. This correspondence can be used to model a recombination-generation rate in the open quantum system.

Appeared in

  • J. Math. Phys. 44 (2003), no. 6, pp. 2373-2401

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