Hardy-Lieb-Thirring inequalities for fractional Schroedinger operators

Details Hardy-Lieb-Thirring inequalities for fractional Schroedinger operators Hardy-Lieb-Thirring inequalities for fractional Schroedinger operators

2006-10-19

arxiv.org/abs/math/0610593v2

J. Amer. Math. Soc. 21, 925-950 (2008)

Mathematics

Spectral Theory

LaTeX2e, 29 pages; corrected version of Lemma 3.3

Scientific paper

We show that the Lieb-Thirring inequalities on moments of negative eigenvalues of Schroedinger-like operators remain true, with possibly different constants, when the critical Hardy-weight $C|x|^{-2}$ is subtracted from the Laplace operator. We do so by first establishing a Sobolev inequality for such operators. Similar results are true for fractional powers of the Laplacian and the Hardy-weight and, in particular, for relativistic Schroedinger operators. We also allow for the inclusion of magnetic vector potentials. As an application, we extend, for the first time, the proof of stability of relativistic matter with magnetic fields all the way up to the critical value of the nuclear charge $Z\alpha=2/\pi$.

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