Abstract
We study Anderson and alloy-type random Schrödinger operators on ℓ2(ℤd) and L 2(ℝd). Wegner estimates are bounds on the average number of eigenvalues in an energy interval of finite box restrictions of these types of operators. For a certain class of models we prove a Wegner estimate which is linear in the volume of the box and the length of the considered energy interval. The single site potential of the Anderson/alloy-type model does not need to have fixed sign, but it needs be of a generalised step function form. The result implies the Lipschitz continuity of the integrated density of states.
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This work has been partially supported by the DFG within the Emmy-Noether-Project “Spectral properties of random Schrödinger operators and random operators on manifolds and graphs”.
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Veselić, I. Wegner Estimates for Sign-Changing Single Site Potentials. Math Phys Anal Geom 13, 299–313 (2010). https://doi.org/10.1007/s11040-010-9081-z
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DOI: https://doi.org/10.1007/s11040-010-9081-z
Keywords
- Random Schrödinger operators
- Alloy-type model
- Integrated density of states
- Wegner estimate
- Single site potential
- Non-monotone