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We consider the energy-critical Schroedinger map initial value problem with smooth initial data from R^2 into the sphere S^2. Given sufficiently energy-dispersed data with subthreshold energy, we prove that the system admits a unique global…

Analysis of PDEs · Mathematics 2012-12-20 Paul Smith

In dimensions $d\geq 4$, we prove that the Schr\"{o}dinger map initial-value problem admits global (in time) solutions for smooth data with small norm in the critical Sobolev space.

Analysis of PDEs · Mathematics 2007-05-23 I. Bejenaru , A. D. Ionescu , C. E. Kenig

We consider the Schr\"{o}dinger map initial-value problem in dimension two or greater. We prove that the Schr\"{o}dinger map initial-value problem admits a unique global smooth solution, provided that the initial data is smooth and small in…

Analysis of PDEs · Mathematics 2008-07-03 Ioan Bejenaru , Alexandru D. Ionescu , Carlos E. Kenig , Daniel Tataru

The spatially periodic initial problem and Cauchy problem for nonlinear Schr\"odinger equations are considered. The existence and uniqueness of global solution with infinite smooth initial data $u_0$, i.e. $u_0,\;|u_0|^{2p}u_0\in…

Analysis of PDEs · Mathematics 2020-11-21 Yongqian Han

In this paper we discuss a priori estimates derived from the energy method to the initial value problem for the cubic nonlinear Schr\"odinger on the sphere $S^2$. Exploring suitable a priori estimates, we prove the existence of solution for…

Analysis of PDEs · Mathematics 2015-02-17 Hideo Takaoka

We prove global well-posedness for low regularity data for the one dimensional quintic defocusing nonlinear Schr\"odinger equation. Precisely we show that a unique and global solution exists for initial data in the Sobolev space…

Analysis of PDEs · Mathematics 2016-08-14 Daniela De Silva , Nataša Pavlović , Gigliola Staffilani , Nikolaos Tzirakis

The initial value problem for the $L^{2}$ critical semilinear Schr\"odinger equation with periodic boundary data is considered. We show that the problem is globally well posed in $H^{s}({\Bbb T^{d}})$, for $s>4/9$ and $s>2/3$ in 1D and 2D…

Analysis of PDEs · Mathematics 2016-08-16 Daniela De Silva , Nataša Pavlović , Gigliola Staffilani , Nikolaos Tzirakis

We consider energy-critical Schroedinger maps with target either the sphere S^2 or hyperbolic plane H^2 and establish that a unique solution may be continued so long as a certain space-time L^4 norm remains bounded. This reduces the large…

Analysis of PDEs · Mathematics 2013-02-18 Benjamin Dodson , Paul Smith

We study the initial value problem for Schr\"odinger-type equations with initial data presenting a certain Gevrey regularity and an exponential behavior at infinity. We assume the lower order terms of the Schr\"odinger operator depending on…

Analysis of PDEs · Mathematics 2019-03-06 Alessia scanelli , Marco Cappiello

We consider equivariant solutions for the Schr\"odinger map problem from $\mathbb{R}^{2+1}$ to $\mathbb{S}^2$ with energy less than $4\pi$ and show that they are global in time and scatter.

Analysis of PDEs · Mathematics 2019-12-19 Ioan Bejenaru , Alexandru Ionescu , Carlos E. Kenig , Daniel Tataru

In this paper we prove a global result for the Schr\"odinger map problem with initial data with small Besov norm at critical regularity.

Analysis of PDEs · Mathematics 2017-01-31 Benjamin Dodson

For compact, isometrically embedded Riemannian manifolds $ N \hookrightarrow \mathbb{R}^L$, we introduce a fourth-order version of the wave map equation. By energy estimates, we prove an $\textit{a priori}$ estimate for smooth local…

Analysis of PDEs · Mathematics 2022-09-20 Tobias Schmid

We consider the Schr\"odinger equation on a half space in any dimension with a class of nonhomogeneous boundary conditions including Dirichlet, Neuman and the so-called transparent boundary conditions. Building upon recent local in time…

Analysis of PDEs · Mathematics 2017-02-23 Corentin Audiard

The results of this paper are twofold. One is that we show the local existence and uniqueness of very regular or smooth solution to the initial-Neumann boundary value problem of the Schr\"{o}dinger flow for maps from a smooth bounded domain…

Analysis of PDEs · Mathematics 2025-12-30 Bo Chen , Youde Wang

We prove that the Schroedinger map initial-value problem is locally well-posed for small data in the Sobolev spaces $H^\sigma$, $\sigma>(d+1)/2$.

Analysis of PDEs · Mathematics 2007-05-23 Alexandru D. Ionescu Carlos E. Kenig

In this paper we present a method to study global regularity properties of solutions of large-data critical Schrodinger equations on certain noncompact Riemannian manifolds. We rely on concentration compactness arguments and a global…

Analysis of PDEs · Mathematics 2010-09-09 Alexandru D. Ionescu , Benoit Pausader , Gigliola Staffilani

We show new local $L^p$-smoothing estimates for the Schr\"odinger equation with initial data in modulation spaces via decoupling inequalities. Furthermore, we probe necessary conditions by Knapp-type examples for space-time estimates of…

Analysis of PDEs · Mathematics 2022-02-04 Robert Schippa

We consider the Schr\"odinger-Debye system in $\mathbb{R}^n$, for $n=3,4$. Developing on previously known local well-posedness results, we start by establishing global well-posedness in $H^1(\mathbb{R}^3)\times L^2(\mathbb{R}^3)$ for a…

Analysis of PDEs · Mathematics 2016-08-02 Adán J. Corcho , Jorge Drumond Silva

We prove resolvent estimates for a Schr\"odinger operator with a short-range potential outside an obstacle with Dirichlet boundary conditions. As a consequence, we deduce integrability of the local energy for the wave equation, and…

Analysis of PDEs · Mathematics 2024-11-25 Thomas Duyckaerts , Jianwei Urban Yang

The matrix Schr\"odinger equation is considered on the half line with the general selfadjoint boundary condition at the origin described by two boundary matrices satisfying certain appropriate conditions. It is assumed that the matrix…

Mathematical Physics · Physics 2017-08-15 Tuncay Aktosun , Ricardo Weder
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