# Cwikel estimates and negative eigenvalues of Schrödinger operators on noncommutative tori

@article{Mcdonald2021CwikelEA, title={Cwikel estimates and negative eigenvalues of Schr{\"o}dinger operators on noncommutative tori}, author={Edward Mcdonald and Raphael Ponge}, journal={Journal of Mathematical Physics}, year={2021} }

In this paper, we establish Cwikel-type estimates for noncommutative tori for any dimension n ≥ 2. We use them to derive Cwikel–Lieb–Rozenblum inequalities and Lieb–Thirring inequalities for negative eigenvalues of fractional Schrödinger operators on noncommutative tori. The latter leads to a Sobolev inequality for noncommutative tori. On the way, we establish a “borderline version” of the abstract Birman–Schwinger principle for the number of negative eigenvalues of relatively compact form…

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