46 citations · 155 across the 20 of their papers we have counts for
7 papers · 1 filter
Semiclassical quantization conditions in strained moiré lattices
Simon Becker, Jens Wittsten
In this article we generalize the Bohr-Sommerfeld rule for scalar symbols at a potential well to matrix-valued symbols having eigenvalues that may coalesce precisely at the bottom…
Uniqueness theorems for weighted harmonic functions in the upper half-plane
Anders Olofsson, Jens Wittsten
We consider a class of weighted harmonic functions in the open upper half-plane known as -harmonic functions. Of particular interest is the uniqueness problem for such functions…
Complex eigenvalue splitting for the Dirac operator
Koki Hirota, Jens Wittsten
We analyze the eigenvalue problem for the semiclassical Dirac (or Zakharov-Shabat) operator on the real line with general analytic potential. We provide Bohr-Sommerfeld quantizatio…
Quantization conditions of eigenvalues for semiclassical Zakharov-Shabat systems on the circle
Setsuro Fujiié, Jens Wittsten
Bohr-Sommerfeld type quantization conditions of semiclassical eigenvalues for the non-selfadjoint Zakharov-Shabat operator on the circle are derived using an exact WKB method. The…
Generalized axially symmetric potentials with distributional boundary values
Jens Wittsten
We study a counterpart of the classical Poisson integral for a family of weighted Laplace differential equations in Euclidean half space, solutions of which are known as generalize…
On the microlocal properties of the range of systems of principal type
Nils Dencker, Jens Wittsten
The purpose of this paper is to study microlocal conditions for inclusion relations between the ranges of square systems of pseudodifferential operators which fail to be locally so…
On Some Microlocal Properties of the Range of a Pseudo-Differential Operator of Principal Type
Jens Wittsten
The purpose of this paper is to obtain microlocal analogues of results by L. H örmander about inclusion relations between the ranges of first order differential operators with coef…