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We prove on the 2D sphere and on the 2D torus the Lieb-Thirring inequalities with improved constants for orthonormal families of scalar and vector functions.

Analysis of PDEs · Mathematics 2020-09-02 Alexei Ilyin , Ari Laptev , Sergey Zelik

We prove on the sphere $\mathbb{S}^2$ the Lieb--Thirring inequalities for orthonormal families of scalar and vector functions both on the whole sphere and on proper domains on $\mathbb{S}^2$. By way of applications we obtain an explicit…

Analysis of PDEs · Mathematics 2018-04-26 Alexei Ilyin , Ari Laptev

In this paper, we obtain new upper bounds for the Lieb-Thirring inequality on the spheres of any dimension greater than $2$. As far as we have checked, our results improve previous results found in the literature for all dimensions greater…

Spectral Theory · Mathematics 2024-07-16 André Pedroso Kowacs , Michael Ruzhansky

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

In this paper, we obtain bounds for the best constants in two inequalities which can be seen as analogues of the Lieb-Thirring inequality, but with the Dirac operator, on the $n-$sphere. We then apply these results in order to improve the…

Spectral Theory · Mathematics 2026-02-12 Uwe Kähler , André Pedroso Kowacs , Michael Ruzhansky

In this paper we prove sharp Lieb-Thirring (LT) inequalities for the family of shifted Coulomb Hamiltonians. More precisely, we prove the classical LT inequalities with the semi-classical constant for this family of operators in any…

Mathematical Physics · Physics 2025-04-09 Thiago Carvalho Corso , Timo Weidl , Zhuoyao Zeng

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

In this paper, motivated by recent important works due to Frank-Lewin-Lieb-Seiringer \cite{FLLS} and Frank-Sabin \cite{frank-sabin-1}, we study the Strichartz inequality on torus with the orthonormal system input and obtain sharp estimates…

Functional Analysis · Mathematics 2018-01-26 Shohei Nakamura

We consider the Lieb-Thirring inequalities on the d-dimensional torus with arbitrary periods. In the space of functions with zero average with respect to the shortest coordinate we prove the Lieb-Thirring inequalities for the…

Analysis of PDEs · Mathematics 2017-01-04 Alexei Ilyin , Ari Laptev

We derive Lieb-Thirring inequalities for the Riesz means of eigenvalues of order gamma >= 3/4 for fourth order Schr\"odinger operators in arbitrary dimensions. We also consider some extensions to polyharmonic operators, and to systems of…

Mathematical Physics · Physics 2007-05-23 Clemens Förster , Jörgen Östensson

This paper considers Lieb-Thirring inequalities for higher order differential operators. A result for general fourth-order operators on the half-line is developed, and the trace inequality tr((-Delta)^2 - C^{HR}_{d,2} / (|x|^4) -…

Spectral Theory · Mathematics 2009-01-11 Tomas Ekholm , Andreas Enblom

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 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

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

The main goal of this work is to present new matrix inequalities of the Cauchy-Schwarz type. In particular, we investigate the so-called Lieb functions, whose definition came as an umbrella of Cauchy-Schwarz-like inequalities, then we…

Functional Analysis · Mathematics 2023-02-21 Mohammad Sababheh , Cristian Conde , Hamid Reza Moradi

In this paper, we establish the following Leray--Adams type inequality on a bounded domain $\Omega$ in $\mathbb R^{4}$ containing the origin, \[ \sup_{u\in C_0^\infty(\Omega), \tilde I_4[u,\Omega,R] \leq 1} \int_\Omega \exp\left(c\left(…

Functional Analysis · Mathematics 2019-03-01 Van Hoang Nguyen

We review recent results on functional inequalities for systems of orthonormal functions. The key finding is that for various operators the orthonormality leads to a gain over a simple application of the triangle inequality. The operators…

Functional Analysis · Mathematics 2021-09-29 Rupert L. Frank

We consider an analogue of the Lieb-Thirring inequality for quantum systems with homogeneous repulsive interaction potentials, but without the antisymmetry assumption on the wave functions. We show that in the strong-coupling limit, the…

Mathematical Physics · Physics 2021-03-31 Kevin Kögler , Phan Thành Nam

We show how a matrix version of the Buslaev-Faddeev-Zakharov trace formulae for a one-dimensional Schr\"odinger operator leads to Lieb-Thirring inequalities with sharp constants $L^{cl}_{\gamma,d}$ with $\gamma\ge 3/2$ and arbitrary $d\ge…

Mathematical Physics · Physics 2007-05-23 A. Laptev , T. Weidl

We prove a Strichartz inequality for a system of orthonormal functions, with an optimal behavior of the constant in the limit of a large number of functions. The estimate generalizes the usual Strichartz inequality, in the same fashion as…

Analysis of PDEs · Mathematics 2014-11-07 Rupert L. Frank , Mathieu Lewin , Elliott H. Lieb , Robert Seiringer
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