Abstract
In this Letter we prove inequalities on the number of bound states of Schrödinger operators by improving the method of Li and Yau relying on heat kernel estimates by Sobolev inequalities. We extend the range of applications and obtain better estimates. In particular, our technique yields a simple proof of Bargmann's bound and very good numerical values.
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Blanchard, P., Stubbe, J. & Rezende, J. New estimates on the number of bound states of Schrödinger operators. Lett Math Phys 14, 215–225 (1987). https://doi.org/10.1007/BF00416851
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DOI: https://doi.org/10.1007/BF00416851