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We develop a modified semi-classical approach to the approximate solution of Schrodinger's equation for certain nonlinear quantum oscillations problems. At lowest order, the Hamilton-Jacobi equation of the conventional semi-classical…

Mathematical Physics · Physics 2015-06-03 Vincent Moncrief , Antonella Marini , Rachel Maitra

We establish global bounds for solutions to stationary and time-dependent Schr\"odinger equations associated with the sublaplacian $\mathcal L$ on the Heisenberg group, as well as its pure fractional power $\mathcal L^s$ and conformally…

Analysis of PDEs · Mathematics 2024-09-19 Luca Fanelli , Haruya Mizutani , Luz Roncal , Nico Michele Schiavone

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

In this paper, regularity properties, Strichartz type estimates to solutions of multipo{\i}nt Cauchy problem for linear and nonlinear abstract wave equations in vector-valued function spaces are obtained. The equation includes a linear…

Analysis of PDEs · Mathematics 2017-09-28 Veli Shakhmurov

We prove existence results and lower bounds for the resonances of Schr\"odinger operators associated to smooth, compactly support potentials on hyperbolic space. The results are derived from a combination of heat and wave trace expansions…

Spectral Theory · Mathematics 2024-07-24 David Borthwick , Yiran Wang

We prove dispersive and Strichartz estimates for Schr\"{o}dinger equations on normal real form symmetric spaces. These estimates apply to the well-posedness and scattering for the nonlinear Schr\"{o}dinger equations.

Analysis of PDEs · Mathematics 2019-10-17 Anestis Fotiadis , Effie Papageorgiou

We solve the Kato square root problem for general elliptic operators and systems with measurable and complex coefficients on any domain of the Euclidean space. The operators are subject to Dirichlet boundary conditions. We also allow…

Analysis of PDEs · Mathematics 2020-03-23 Julan Bailey , El Maati Ouhabaz

Water waves are well-known to be dispersive at the linearization level. Considering the fully nonlinear systems, we prove for reasonably smooth solutions the optimal Strichartz estimates for pure gravity waves and the semi-classical…

Analysis of PDEs · Mathematics 2016-09-27 Quang-Huy Nguyen

We obtain KSS, Strichartz and certain weighted Strichartz estimate for the wave equation on $(\R^d, \mathfrak{g})$, $d \geq 3$, when metric $\mathfrak{g}$ is non-trapping and approaches the Euclidean metric like $ x ^{- \rho}$ with…

Analysis of PDEs · Mathematics 2011-02-03 Christopher D. Sogge , Chengbo Wang

We introduce a notion of smooth fields of operators following the notion of smooth fields of Hilbert spaces recently defined by L. Lempert and R. Sz\H{o}oke arXiv:1004.4863(2) . Formally, if $\nabla$ is the connection of a smooth field of…

Functional Analysis · Mathematics 2021-07-07 F. Belmonte , H. Bustos , S. Cuéllar

The Kato-Yajima smoothing estimate is a smoothing weighted $L^2$ estimate with a singular power weight for the Schr\"odinger propagator. The weight has been generalized relatively recently to Morrey-Campanato weights. In this paper we make…

Analysis of PDEs · Mathematics 2019-03-05 Ihyeok Seo

We prove an optimal dispersive $L^{\infty}$ decay estimate for a three dimensional wave equation perturbed with a large non smooth potential belonging to a particular Kato class. The proof is based on a spectral representation of the…

Analysis of PDEs · Mathematics 2007-05-23 Piero D'Ancona , Vittoria Pierfelice

The purpose of this article is to construct global solutions, in a probabilistic sense, for the nonlinear Schr{\"o}dinger equation posed on $\mathbb{R}^d$, in a supercritical regime. Firstly, we establish Bourgain type bilinear estimates…

Analysis of PDEs · Mathematics 2023-04-24 Nicolas Burq , Aurélien Poiret , Laurent Thomann

We establish Strichartz estimates, including estimates involving spatial derivatives, for radial wave equations with potentials in similarity variables. This is accomplished for all spatial dimensions $d\geq 3$ and almost all regularities…

Analysis of PDEs · Mathematics 2024-11-26 David Wallauch

We prove $L^p$ and smoothing estimates for the resolvent of magnetic Schr\"odinger operators. We allow electromagnetic potentials that are small perturbations of a smooth, but possibly unbounded background potential. As an application, we…

Analysis of PDEs · Mathematics 2016-07-19 Jean-Claude Cuenin , Carlos Kenig

Self-adjoint Schr\"odinger operators with $\delta$ and $\delta'$-potentials supported on a smooth compact hypersurface are defined explicitly via boundary conditions. The spectral properties of these operators are investigated, regularity…

Spectral Theory · Mathematics 2013-02-18 Jussi Behrndt , Matthias Langer , Vladimir Lotoreichik

In this paper we prove Strichartz estimates for the Dirac equation on asymptotically flat manifolds. The proof combines the weak dispersive estimates proved by the first two authors with the Strichartz and smoothing estimates for the wave…

Analysis of PDEs · Mathematics 2022-03-31 Federico Cacciafesta , Anne-Sophie de Suzzoni , Long Meng

We prove almost Strichartz estimates found after adding regularity in the spherical coordinates for Schr\"odinger-like equations. The estimates are sharp up to endpoints. The proof relies on estimates involving spherical averages. Sharpness…

Analysis of PDEs · Mathematics 2019-12-03 Robert Schippa

We prove some local smoothing estimates for the Schr\"{o}dinger initial value problem with data in $L^2(\mathbb{R}^d)$, $d \geq 2$ and a general class of potentials. In the repulsive setting we have to assume just a power like decay…

Analysis of PDEs · Mathematics 2008-02-18 J. A. Bercelo , A. Ruiz , L. Vega , M. C. Vilela

We present a procedure to solve the Schroedinger equation of two interacting electrons in a quantum dot in the presence of an external magnetic field within the context of quasi-exactly-solvable spectral problems. We show that the…

Quantum Physics · Physics 2007-05-23 Ramazan Koc , Hayriye Tutunculer , Eser Olgar