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In this paper, we prove restriction theorems for the Fourier-Laguerre transform and establish Strichartz estimates for the Schr\"{o}dinger propagator $e^{-itL_\alpha}$ for the Laguerre operator…

Functional Analysis · Mathematics 2022-05-24 Guoxia Feng , Manli Song

In this paper, we prove Strichartz estimates for the $(k,a)$-generalized Laguerre operators $a^{-1}\bigl(-|x|^{2-a}\Delta_k+|x|^a\bigr)$ which were introduced by Ben Sa\"{\i}d-Kobayashi-Orsted, and for the operators $|x|^{2-a}\Delta_k$.…

Analysis of PDEs · Mathematics 2025-03-04 Kouichi Taira , Hiroyoshi Tamori

Let $\mathcal{L}$ be the special Hermite operator on $\mathbb{C}^n$. As a continuation of the recent results in \cite{SG}, we establish new Strichartz estimates for systems of orthonormal functions associated with general flows of the form…

Functional Analysis · Mathematics 2025-11-24 Sunit Ghosh , Jitendriya Swain

Let $\Delta_\kappa$ be the Dunkl-Laplacian on $\mathbb{R}^n$. The main aim of this paper is to investigate the orthonormal Strichartz estimates for the Schr\"odinger equation with initial data from the homogeneous Dunkl-Sobolev space…

Functional Analysis · Mathematics 2025-06-11 Guoxia Feng , Shyam Swarup Mondal , Manli Song , Huoxiong Wu

Strichartz inequality for the solutions of free Schr\"odinger equation associated with Dunkl Hermite operator $H_\kappa$ is generalized to any system of orthonormal functions with initial data. A relation between the kernels of…

Classical Analysis and ODEs · Mathematics 2022-11-21 P Jitendra Kumar Senapati , Pradeep Boggarapu

The classical Strichartz estimates for the free Schr\"odinger propagator have recently been substantially generalised to estimates of the form \[ \bigg\|\sum_j\lambda_j|e^{it\Delta}f_j|^2\bigg\|_{L^p_tL^q_x}\lesssim\|\lambda\|_{\ell^\alpha}…

Functional Analysis · Mathematics 2017-08-21 Neal Bez , Younghun Hong , Sanghyuk Lee , Shohei Nakamura , Yoshihiro Sawano

In this article, we define the Fourier-Dunkl transform, which generalizes the Fourier transform. We prove Strichartz's restriction theorem for the Fourier-Dunkl transform for a cone-hyper-surface and its generalisation to the family of…

Classical Analysis and ODEs · Mathematics 2022-12-08 P Jitendra Kumar Senapati , Pradeep Boggarapu , Shyam Swarup Mondal , Hatem Mejjaoli

In this article, we prove the analogue theorems of Stein-Tomas and Srtichartz on the discrete surface restrictions of Fourier-Hermite transforms associated with the normalized Hermite polynomials and obtain the Strichartz estimate for the…

Classical Analysis and ODEs · Mathematics 2025-03-10 Sunit Ghosh , Jitendriya Swain

We construct a two-parameter family of actions \omega_{k,a} of the Lie algebra sl(2,R) by differential-difference operators on R^N \setminus {0}. Here, k is a multiplicity-function for the Dunkl operators, and a>0 arises from the…

Representation Theory · Mathematics 2019-02-20 Salem Ben Said , Toshiyuki Kobayashi , Bent Orsted

The main objective of this paper is to extend certain fundamental inequalities from a single function to a family of orthonormal systems. In the first part of the paper, we consider a non-negative, self-adjoint operator $L$ on $L^2(X,\mu)$,…

Functional Analysis · Mathematics 2024-09-24 Guoxia Feng , Shyam Swarup Mondal , Manli Song , Huoxiong Wu

In this paper, we will define $a$-deformed Laguerre operators $L_{a,\alpha}$ and $a$-deformed Laguerre holomorphic semigroups on $L^2\left(\left(0,\infty\right),d\mu_{a,\alpha}\right)$. Then we give a spherical harmonic expansion, which…

Classical Analysis and ODEs · Mathematics 2022-10-28 Wentao Teng

We develop an abstract perturbation theory for the orthonormal Strichartz estimates, which were first studied by Frank-Lewin-Lieb-Seiringer. The method used in the proof is based on the duality principle and the smooth perturbation theory…

Mathematical Physics · Physics 2023-12-14 Akitoshi Hoshiya

In this article, we prove the restriction theorem for the Fourier-Hermite transform and obtain the Strichartz estimate for the system of orthonormal functions for the Hermite operator $H=-\Delta+|x|^2$ on $\mathbb{R}^n$ as application.…

Functional Analysis · Mathematics 2022-03-08 Shyam Swarup Mondal , Jitendriya Swain

This paper is dedicated to the proof of Strichartz estimates on the Heisenberg group $\mathbb{H}^d$ for the linear Schr\"odinger and wave equations involving the sublaplacian. The Schr\"odinger equation on $\mathbb{H}^d$ is an example of a…

Analysis of PDEs · Mathematics 2021-02-02 Hajer Bahouri , Davide Barilari , Isabelle Gallagher

We establish new Strichartz estimates for orthonormal families of initial data in the case of the wave, Klein-Gordon and fractional Schr\"odinger equations. Our estimates extend those of Frank-Sabin in the case of the wave and Klein-Gordon…

Analysis of PDEs · Mathematics 2020-04-28 Neal Bez , Sanghyuk Lee , Shohei Nakamura

We generalize the theorems of Stein--Tomas and Strichartz about surface restrictions of Fourier transforms to systems of orthonormal functions with an optimal dependence on the number of functions. We deduce the corresponding Strichartz…

Mathematical Physics · Physics 2014-05-28 Rupert L. Frank , Julien Sabin

The primary objective of this paper is to investigate the orthonormal Strichartz estimates at the critical summability exponent for the Schr\"odinger operator $e^{it\Delta}$ with initial data from the homogeneous Sobolev space $\dot{H}^s…

Analysis of PDEs · Mathematics 2025-07-22 Guoxia Feng , Manli Song , Huoxiong Wu

We study the two-parameter family of unitary operators \[ \mathcal{F}_{k,a}=\exp\Bigl(\frac{i\pi}{2a}\,(2\langle k\rangle+{d}+a-2 )\Bigr) \exp\Bigl(\frac{i\pi}{2a}\,\Delta_{k,a}\Bigr), \] which are called $(k,a)$-generalized Fourier…

Classical Analysis and ODEs · Mathematics 2015-07-24 Dmitry Gorbachev , Valery Ivanov , Sergey Tikhonov

In this paper we study the linear and nonlinear Schr\"odinger equations associated with the Ornstein-Uhlenbeck (OU) operator endowed with the Gaussian measure. While classical Strichartz estimates are well-developed for the free…

Functional Analysis · Mathematics 2025-07-08 Aparajita Dasgupta , Uttam Kumar Dolai , Cheng Luo , Manli Song

In this paper we prove the orthonormal Strichartz estimates for the higher order and fractional Schr\"odinger, wave, Klein-Gordon and Dirac equations with potentials. As in the case of the Schr\"odinger operator, the proofs are based on the…

Analysis of PDEs · Mathematics 2024-01-18 Akitoshi Hoshiya
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