On the Magnetic Laplacian with a Piecewise Constant Magnetic Field in. R3

EL Giacomelli - Quantum Mathematics I, 2023 - Springer
We study a Schrödinger operator in. R3+:={x∈ R3| x=(x1, x2, x3), x2> 0} with a magnetic
field admitting a piecewise constant strength and a uniform direction. We review some …

Quantum systems at the brink

D Hundertmark, M Jex, M Lange - INdAM Meeting: Quantum Mathematics …, 2022 - Springer
We present a method to calculate the asymptotic behavior of eigenfunctions of Schrödinger
operators that also works at the threshold of the essential spectrum. It can be viewed as a …

On the ground state of lattice Schr\"{o} dinger operators

M Jex, F Štampach - arxiv preprint arxiv:2312.08081, 2023 - arxiv.org
We prove necessary and sufficient conditions for lattice Schr\"{o} dinger operators to have a
zero energy bound state in arbitrary dimension. The two criteria are sharp, complementary …