Uniform convergence of spectral shift functions

Details Uniform convergence of spectral shift functions Uniform convergence of spectral shift functions

2010-07-15

arxiv.org/abs/1007.2670v1

Physics

Mathematical Physics

For the procceedings of the RIMS workshop "Spectra of Random Operators and Related Topics" in Kyoto, December 2009

Scientific paper

The spectral shift function \xi_{L}(E) for a Schr\"odinger operator restricted to a finite cube of length L in multi-dimensional Euclidean space, with Dirichlet boundary conditions, counts the number of eigenvalues less than or equal to E \in \RR created by a perturbation potential V. We study the behavior of this function \xi_{L}(E) as L to infinity for the case of a compactly-supported and bounded potential V. After reviewing results of Kirsch [Proc. Amer. Math. Soc. 101, 509-512 (1987)], and our recent pointwise convergence result for the Ces\`aro mean [Proc. Amer. Math. Soc. 138, 2141-2150 (2010)], we present a new result on the convergence of the energy-averaged spectral shift function that is uniform with respect to the location of the potential V within the finite box.

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