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math-ph2009★ 1 cited
Trotter-Kato product formula for unitary groups
Pavel Exner, Hagen Neidhardt
Let and be non-negative self-adjoint operators in a separable Hilbert space such that its form sum is densely defined. It is shown that the Trotter product formula hold…
math-ph2009★ 4 cited
On geometric perturbations of critical Schrödinger operators with a surface interaction
P. Exner, M. Fraas
We study singular Schrodinger operators with an attractive interaction supported by a closed smooth surface A in R^3 and analyze their behavior in the vicinity of the critical situ…