47 citations · 183 across the 10 of their papers we have counts for
10 papers
On the connection coefficients for linear differential systems with applications to the spheroidal and ellipsoidal wave equation
Harald Schmid
This paper is concerned with the connection coefficients between the local fundamental solutions of a linear ordinary differential system with two neighboring regular s…
Computation of the eigenvalues for the angular and Coulomb spheroidal wave equation
Harald Schmid
In this paper we study the eigenvalues of the angular spheroidal wave equation and its generalization, the Coulomb spheroidal wave equation. An associated differential system and a…
On the deformation of linear Hamiltonian systems
Harald Schmid
For linear Hamiltonian systems we investigate the problem how the eigenvalues depend on the entries of the coefficient matrix . Th…
The Dirac propagator in the extreme Kerr metric
D. Batic, H. Schmid
Starting with the Dirac equation in the extreme Kerr metric we derive an integral representation for the propagator of solutions of the Cauchy problem with initial data in the clas…
Heun equation, Teukolsky equation, and type-D metrics
D. Batic, H. Schmid
Starting with the whole class of type-D vacuum backgrounds with cosmological constant we show that the separated Teukolsky equation for zero rest-mass fields with spin (g…
The generalized Heun equation in QFT in curved space-times
Davide Batic, Harald Schmid, Monika Winklmeier
In this article we give a brief outline of the applications of the generalized Heun equation (GHE) in the context of Quantum Field Theory in curved space-times. In particular, we r…