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For $s\textgreater{}0$, let $H\_0=(-\Delta)^s$ be the fractional Laplacian. In this paper, we obtainLieb-Thirring type inequalities for the fractional Schr\"odinger operator defined as $H=H\_0+V$,where $V \in L^p(\mathbb{R}^d), p\ge 1, d\ge…

Spectral Theory · Mathematics 2016-01-18 Clément Dubuisson

This paper has been withdrawn by the author in favor of a stronger result proven by the author with R. Frank and T. Weidl in arXiv:0707.0998

Spectral Theory · Mathematics 2007-07-09 Barry Simon

We prove Lieb-Thirring inequalities with improved constants on the two-dimensional sphere and the two-dimensional torus. In the one-dimensional periodic case we obtain a simultaneous bound for the negative trace and the number of negative…

Spectral Theory · Mathematics 2011-04-14 Alexei A. Ilyin

We prove sharp Lieb-Thirring type inequalities for the eigenvalues of a class of one-dimensional functional difference operators associated to mirror curves. We furthermore prove that the bottom of the essential spectrum of these operators…

Functional Analysis · Mathematics 2021-12-07 Ari Laptev , Lukas Schimmer

We prove sharp Lieb-Thirring inequalities for Schroedinger operators with potentials supported on a hyperplane and we show how these estimates are related to Lieb-Thirring inequalities for relativistic Schroedinger operators.

Mathematical Physics · Physics 2007-11-27 Rupert L. Frank , Ari Laptev

We prove a Lieb--Thirring inequality for Schr\"odinger operators $-\frac{\mathrm{d}^2}{\mathrm{d}x^2}+V$ on the semi-axis with Robin boundary condition at the origin. The result improves on a bound obtained by P.~Exner, A.~Laptev and…

Spectral Theory · Mathematics 2022-05-31 Lukas Schimmer

In this short note we prove Lieb--Thirring inequalities on manifolds with negative constant curvature. The discrete spectrum appears below the continuous spectrum $(d-1)^2/4, \infty)$, where $d$ is the dimension of the hyperbolic space. As…

Differential Geometry · Mathematics 2023-07-18 Alexei Ilyin , Ari Laptev , Timon Weinmann

We provide new estimates on the best constant of the Lieb-Thirring inequality for the sum of the negative eigenvalues of Schr\"odinger operators, which significantly improve the so far existing bounds.

Mathematical Physics · Physics 2024-01-31 Rupert L. Frank , Dirk Hundertmark , Michal Jex , Phan Thành Nam

We prove a sharp Lieb-Thirring type inequality for Jacobi matrices, thereby settling a conjecture of Hundertmark and Simon. An interesting feature of the proof is that it employs a technique originally used by Hundertmark-Laptev-Weidl…

Classical Analysis and ODEs · Mathematics 2021-05-18 Ari Laptev , Michael Loss , Lukas Schimmer

We establish Lieb-Thirring power bounds on discrete eigenvalues of Jacobi operators for Schatten class complex perturbations of periodic and more generally finite gap Jacobi matrices.

Spectral Theory · Mathematics 2017-09-25 Jacob S. Christiansen , Maxim Zinchenko

We prove a one-dimensional Hardy inequality on the halfline with sharp constant, which improves the classical form of this inequality. As a consequence of this new inequality we can rederive known doubly weighted Hardy inequalities. Our…

Analysis of PDEs · Mathematics 2022-04-05 Rupert L. Frank , Ari Laptev , Timo Weidl

In this paper we prove refined first-order interpolation inequalities for periodic functions and give applications to various refinements of the Carlson--Landau-type inequalities and to magnetic Schrodinger operators. We also obtain…

Analysis of PDEs · Mathematics 2015-02-06 Alexei Ilyin , Ari Laptev , Michael Loss , Sergey Zelik

We give a short and unified proof of Hardy-Lieb-Thirring inequalities for moments of eigenvalues of fractional Schroedinger operators. The proof covers the optimal parameter range. It is based on a recent inequality by Solovej, Soerensen,…

Mathematical Physics · Physics 2011-09-05 Rupert L. Frank

In this paper we disprove part of a conjecture of Lieb and Thirring concerning the best constant in their eponymous inequality. We prove that the best Lieb-Thirring constant when the eigenvalues of a Schr\"odinger operator $-\Delta+V(x)$…

Analysis of PDEs · Mathematics 2021-06-02 Rupert L. Frank , David Gontier , Mathieu Lewin

We establish Lieb-Thirring power bounds on discrete eigenvalues of Jacobi operators for Schatten class perturbations under very general assumptions. Our results apply, in particular, to perturbations of reflectionless Jacobi operators with…

Spectral Theory · Mathematics 2017-09-25 Jacob S. Christiansen , Maxim Zinchenko

In this paper, we obtain remainder term representation formulae for the higher-order Steklov inequality for vector fields which imply short and direct proofs of the sharp (classical) Steklov inequalities. The obtained results directly imply…

Analysis of PDEs · Mathematics 2020-05-12 Tohru Ozawa , Durvudkhan Suragan

In this paper we prove Lieb--Thirring inequalities for magnetic Schr\"odinger operators on the torus, where the constants in the inequalities depend on the magnetic flux.

Spectral Theory · Mathematics 2023-06-01 Alexei Ilyin , Ari Laptev

We consider 3-dim Schr\"odinger operators with a complex potential. We obtain new trace formulas. In order to prove these results we study analytic properties of a modified Fredholm determinant. In fact we reformulate spectral theory…

Spectral Theory · Mathematics 2017-12-27 Evgeny Korotyaev

The research on spectral inequalities for discrete Schrodinger Operators has proved fruitful in the last decade. Indeed, several authors analysed the operator's canonical relation to a tridiagonal Jacobi matrix operator. In this paper, we…

Functional Analysis · Mathematics 2013-12-09 Arman Sahovic

We prove certain $L^p$ Sobolev-type inequalities for twisted differential forms on real (and complex) manifolds for the Laplace operator $\Delta$, the differential operators $d$ and $d^*$, and the operator $\bar\partial$. A key tool to get…

Analysis of PDEs · Mathematics 2025-01-13 Fusheng Deng , Gang Huang , Xiangsen Qin