The magnetic D-to-N ground state energy obeys λ = α̂ b^{1/2} − α̂² + (1/3) max κ + o(1) in 2D, with a 3D limit given by the boundary infimum of λ^DN(ϑ(x)) |B(x)|^{1/2}.
A note on the magnetic Steklov operator on functions
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We consider the magnetic Steklov eigenvalue problem on compact Riemannian manifolds with boundary for generic magnetic potentials and establish various results concerning the spectrum. We provide equivalent characterizations of magnetic Steklov operators which are unitarily equivalent to the classical Steklov operator and study bounds for the smallest eigenvalue. We prove a Cheeger-Jammes type lower bound for the first eigenvalue by introducing magnetic Cheeger constants. We also obtain an analogue of an upper bound for the first magnetic Neumann eigenvalue due to Colbois, El Soufi, Ilias and Savo. In addition, we compute the full spectrum in the case of the Euclidean $2$-ball and $4$-ball for a particular choice of magnetic potential given by Killing vector fields, and discuss the behavior. Finally, we establish a comparison result for the magnetic Steklov operator associated with the manifold and the square root of the magnetic Laplacian on the boundary, which generalizes the uniform geometric upper bounds for the difference of the corresponding eigenvalues in the non-magnetic case due to Colbois, Girouard and Hassannezhad.
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Asymptotics for the magnetic Dirichlet-to-Neumann eigenvalues in general domains
The magnetic D-to-N ground state energy obeys λ = α̂ b^{1/2} − α̂² + (1/3) max κ + o(1) in 2D, with a 3D limit given by the boundary infimum of λ^DN(ϑ(x)) |B(x)|^{1/2}.