3 papers
math-ph2026
The Unruh state for bosonic Teukolsky fields on subextreme Kerr spacetimes
Dietrich Häfner, Christiane K. M. Klein
We perform the quantization of Teukolsky scalars of spin , , and within the algebraic approach to quantum field theory. We first discuss the classical phase space…
math.AP2025
Nonlinear Schrödinger equation on a unit ball in one and two dimensions
Christian Klein, Svetlana Roudenko, Nikola Stoilov
We consider the nonlinear Schrödinger equation on a unit ball in one and two dimensions with Dirichlet boundary conditions, which have stabilizing effect on solutions behavior. In…
math.AP2025
A numerical study of stability for solitary waves of a quasi-linear Schr{ö}dinger equation
Meriem Bahhi, Jonas Lampart, Christian Klein +1
We discuss the (in)stability of solitary waves for a quasi-linear Schr{ö}dinger equation. The equation contains a quasi-linear term, responsible for a saturation effect, as well a…