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In this paper we prove $L^p$ estimates for Stein's square functions associated to Fourier-Bessel expansions. Furthermore we prove transference results for square functions from Fourier-Bessel series to Hankel transforms. Actually, these are…

Classical Analysis and ODEs · Mathematics 2019-12-19 Víctor Almeida , Jorge J. Betancor , Estefanía Dalmasso , Lourdes Rodríguez-Mesa

In this paper we prove pointwise and distributional Fourier transform inversion theorems for functions on the real line that are locally of bounded variation, while in a neighbourhood of infinity are Lebesgue integrable or have polynomial…

Classical Analysis and ODEs · Mathematics 2022-03-29 Erik Talvila

We investigate threshold phenomena in weighted $\ell^2$-spaces and characterize the critical regimes where elements with either small support or maximally bad range can be constructed. Our results are shown to be optimal in several…

Functional Analysis · Mathematics 2026-01-12 Adem Limani

Precision measurements with quantum systems rely on our ability to trace the differences between experimental signals to variations in unknown physical parameters. In this Letter we derive the Fisher information and the ensuing Cramer-Rao…

Quantum Physics · Physics 2015-06-17 Søren Gammelmark , Klaus Mølmer

In \cite{NaTa} Naor and Tao extended to the metric setting the $O(d \log d)$ bounds given by Stein and Str\"omberg for Lebesgue measure in $\mathbb{R}^d$, deriving these bounds first from a localization result, and second, from a random…

Classical Analysis and ODEs · Mathematics 2018-12-06 J. M. Aldaz

We use Stein's method to prove a generalization of the Lindeberg-Feller CLT providing an upper and a lower bound for the superior limit of the Kolmogorov distance between a normally distributed random variable and the rowwise sums of a…

Probability · Mathematics 2011-12-30 Ben Berckmoes , Bob Lowen , Jan Van Casteren

We derive new concentration bounds for time averages of measurement outcomes in quantum Markov processes. This generalizes well-known bounds for classical Markov chains which provide constraints on finite time fluctuations of time-additive…

Quantum Physics · Physics 2023-07-19 Federico Girotti , Juan P. Garrahan , Mădălin Guţă

This memoir contains an overview of the proof of the bounded $L^2$ curvature conjecture. More precisely we show that the time of existence of a classical solution to the Einstein-vacuum equations depends only on the $L^2$-norm of the…

Analysis of PDEs · Mathematics 2013-01-21 Sergiu Klainerman , Igor Rodnianski , Jeremie Szeftel

We prove new Pitt inequalities for the Fourier transforms with radial and non-radial weights using weighted restriction inequalities for the Fourier transform on the sphere. We also prove new Riemann-Lebesgue estimates and versions of the…

Functional Analysis · Mathematics 2015-09-04 Laura De Carli , Dmitriy Gorbachev , Sergey Tikhonov

We perform an analysis supplementing the metrology toolbox in the time-frequency domain. While the relevant time-frequency-based metrological protocols can be borrowed from the spatial domain, where they have recently been well developed,…

Quantum Physics · Physics 2024-07-30 Łukasz Rudnicki , Tomasz Linowski

We prove a Fourier restriction estimate under the assumption that certain convolution power of the measure admits an $r$-integrable density.

Classical Analysis and ODEs · Mathematics 2014-04-15 Xianghong Chen

We prove a sharp quantitative version of the Faber--Krahn inequality for the short-time Fourier transform (STFT). To do so, we consider a deficit $\delta(f;\Omega)$ which measures by how much the STFT of a function $f\in L^2(\mathbb R)$…

Classical Analysis and ODEs · Mathematics 2023-07-19 Jaime Gómez , André Guerra , João P. G. Ramos , Paolo Tilli

In this paper, we give another proof of quantum Stein's lemma by calculating the information spectrum, and study an asymptotic optimal measurement in the sense of Stein's lemma. We propose a projection measurement characterized by the…

Quantum Physics · Physics 2007-05-23 Masahito Hayashi

Recently Wolff obtained a sharp $L^2$ bilinear restriction theorem for bounded subsets of the cone in general dimension. Here we adapt the argument of Wolff to also handle subsets of ``elliptic surfaces'' such as paraboloids and spheres.…

Classical Analysis and ODEs · Mathematics 2007-05-23 Terence Tao

In this short note we first extend the validity of the spectral radius formula obtained in \cite{ag} to Fourier--Stieltjes algebras. The second part is devoted to showing that for the measure algebra on any locally compact non-discrete…

Functional Analysis · Mathematics 2019-04-18 Przemysław Ohrysko , Maria Roginskaya

We generalize the observable diameter and the separation distance for metric measure spaces to those for pyramids, and prove some limit formulas for these invariants for a convergent sequence of pyramids. We obtain various applications of…

Metric Geometry · Mathematics 2014-02-28 Ryunosuke Ozawa , Takashi Shioya

We defend the Fock-space Hamiltonian truncation method, which allows to calculate numerically the spectrum of strongly coupled quantum field theories, by putting them in a finite volume and imposing a UV cutoff. The accuracy of the method…

High Energy Physics - Theory · Physics 2018-08-21 Slava Rychkov , Lorenzo G. Vitale

The local $L^2$-mapping property of Fourier integral operators has been established in H\"ormander \cite{H} and in Eskin \cite{E}. In this paper, we treat the global $L^2$-boundedness for a class of operators that appears naturally in many…

Analysis of PDEs · Mathematics 2007-05-23 Michael Ruzhansky , Mitsuru Sugimoto

While spike trains are obviously not band-limited, the theory of super-resolution tells us that perfect recovery of unknown spike locations and weights from low-pass Fourier transform measurements is possible provided that the minimum…

Information Theory · Computer Science 2017-01-24 Céline Aubel , David Stotz , Helmut Bölcskei

Introducing and studying the pattern frequency algebra, we prove the analogue of L\"uck's approximation theorems on $L^2$-spectral invariants in the case of aperiodic order. These results imply a uniform convergence theorem for the…

Functional Analysis · Mathematics 2007-05-23 Gábor Elek
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