An inverse boundary value problem for the magnetic Schrödinger operator with a bounded magnetic potential in a slab

Abstract: We study an inverse boundary value problem with partial data in an infinite slab in $\mathbb{R}^{n}$, $n\geq 3$, for the magnetic Schr\"{o}dinger operator with an $L^{\infty}$ magnetic potential and an $L^{\infty}$ electric potential. We show that the magnetic field and the electric potential can be uniquely determined, when the Dirichlet and Neumann data are given on either different boundary hyperplanes or on the same boundary hyperplanes of the slab. This generalizes the result in [11], where the same uniqueness result was established when the magnetic potential is Lipschitz continuous. The proof is based on the complex geometric optics solutions constructed in [14], which are special solutions to the magnetic Schr\"{o}dinger equation with $L^{\infty}$ magnetic and electric potentials in a bounded domain.