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We establish the probabilistic well-posedness of the nonlinear Schr\"odinger equation on the $2d$ sphere $\mathbb{S}^{2}$. The initial data are distributed according to Gaussian measures with typical regularity $H^{s}(\mathbb{S}^{2})$, for…

Analysis of PDEs · Mathematics 2025-06-25 Nicolas Burq , Nicolas Camps , Chenmin Sun , Nikolay Tzvetkov

We consider the Cauchy problem of a system of quadratic derivative nonlinear Schr\"odinger equations which was introduced by M. Colin and T. Colin (2004) as a model of laser-plasma interaction. For the nonperiodic setting, the authors…

Analysis of PDEs · Mathematics 2025-07-11 Hiroyuki Hirayama , Shinya Kinoshita , Mamoru Okamoto

We prove a local in time well-posedness result for quasi-linear Hamiltonian Schr\"odinger equations on $\mathbb{T}^d$ for any $d\geq 1$. For any initial condition in the Sobolev space $H^s$, with $s$ large, we prove the existence and…

Analysis of PDEs · Mathematics 2022-02-15 Roberto Feola , Felice Iandoli

Considering the Cauchy problem for the modified finite-depth-fluid equation $\partial_tu-\G_\delta(\partial_x^2u)\mp u^2u_x=0, u(0)=u_0$, where $\G_\delta f=-i \ft ^{-1}[\coth(2\pi \delta \xi)-\frac{1}{2\pi \delta \xi}]\ft f$, $\delta\ges…

Analysis of PDEs · Mathematics 2008-09-16 Zihua Guo , Baoxiang Wang

We prove the global existence of the solution for fractional Hartree equations with initial data in certain real interpolation spaces between $L^{2}$ and some kinds of new function spaces defined by fractional Schr\"odinger semigroup, which…

Analysis of PDEs · Mathematics 2025-11-05 Yufeng Lu

We study Cauchy problem for the Klein-Gordon (HNLKG), wave (HNLW) and Schr\"odinger (HNLS) equations with cubic convolution (Hartree type) nonlinearity. Some global well-posedness and scattering are obtained for the (HNLKG) and (HNLS) with…

Analysis of PDEs · Mathematics 2018-10-29 Divyang G. Bhimani

We study the Derivative Nonlinear Schr\"odinger (DNLS). equation for general initial conditions in weighted Sobolev spaces that can support bright solitons (but exclude spectral singularities corresponding to algebraic solitons). We show…

Analysis of PDEs · Mathematics 2017-10-12 Robert Jenkins , Jiaqi Liu , Peter Perry , Catherine Sulem

Using the theory of almost conserved energies and the ``I-method'' developed by Colliander, Keel, Staffilani, Takaoka and Tao, we prove that the initial value problem for a higher order Schr\"odinger equation is globally well-posed in…

Analysis of PDEs · Mathematics 2007-05-23 Xavier Carvajal

We consider the Cauchy problem associated with the modified Zakharov-Kuznetsov equation over $\mathbb{R}^2$. Taking into consideration the associated dispersive effects, we introduce, for $s,a\ge 0$, a two-parameter space…

Analysis of PDEs · Mathematics 2025-08-01 Simão Correia , Shinya Kinoshita

This paper is devoted to the well-posedness of stochastic nonlinear Schr\"odinger equations in the energy space H1(Rd), which is a natural continuation of our recent work [1]. We consider both focusing and defocusing nonlinearities and…

Probability · Mathematics 2014-04-22 Viorel Barbu , Michael Röckner , Deng Zhang

The nonlinear wave and Schrodinger equations on Euclidean space of any dimension, with general power nonlinearity and with both the focusing and defocusing signs, are proved to be ill-posed in the Sobolev space of index s whenever the…

Analysis of PDEs · Mathematics 2007-05-23 Michael Christ , James Colliander , Terence Tao

In this paper, the global well-posedness of semirelativistic equations with a power type nonlinearity on Euclidean spaces is studied. In two dimensional $H^s$ scaling subcritical case with $1 \leq s \leq 2$, the local well-posedness follows…

Analysis of PDEs · Mathematics 2016-11-30 Kazumasa Fujiwara , Vladimir Georgiev , Tohru Ozawa

We establish the local Hadamard well-posedness of a certain third-order nonlinear Schr\"odinger equation with a multi-term linear part and a general power nonlinearity known as the higher-order nonlinear Schr\"odinger equation, formulated…

Analysis of PDEs · Mathematics 2026-01-19 Chris Mayo , Dionyssios Mantzavinos , Türker Ozsarı

This paper studies the quintic nonlinear Schr\"odinger equation on $\mathbb{R}^d$ with randomized initial data below the critical regularity $H^{\frac{d-1}{2}}$. The main result is a proof of almost sure local well-posedness given a Wiener…

Analysis of PDEs · Mathematics 2018-08-22 Justin T. Brereton

We prove local well-posedness for the periodic derivative nonlinear Schrodinger's equation, which is L^2 critical, in Fourier-Lebesgue spaces which scale like H^s(T) for s>0. In particular we close the existing gap in the subcritical theory…

Analysis of PDEs · Mathematics 2020-12-02 Yu Deng , Andrea R. Nahmod , Haitian Yue

We consider a family of intermediate nonlinear Schr\"{o}dinger equations (INLS) on the real line, which includes the continuum Calogero-Moser models (CCM). We prove that INLS is locally well-posed in $H^{s}(\mathbb{R})$ for any $s>\frac…

Analysis of PDEs · Mathematics 2025-11-04 Andreia Chapouto , Justin Forlano , Thierry Laurens

In this paper, we study the Cauchy problem for the inhomogeneous biharmonic nonlinear Schr\"{o}dinger equation (IBNLS) \[iu_{t} +\Delta^{2} u=\lambda |x|^{-b}|u|^{\sigma}u,u(0)=u_{0} \in H^{s} (\mathbb R^{d}),\] where $\lambda \in \mathbb…

Analysis of PDEs · Mathematics 2022-07-13 JinMyong An , PyongJo Ryu , JinMyong Kim

We consider the focusing energy-critical inhomogeneous nonlinear Schr\"{o}dinger equation \[ iu_t + \Delta u = -|x|^{-b}|u|^{\alpha}u \] where $n \geq 3$, $0<b<\min(2, n/2)$, and $\alpha=(4-2b)/(n-2)$. We prove the global well-posedness and…

Analysis of PDEs · Mathematics 2024-10-17 Dongjin Park

This article is devoted to review the known results on global well-posedness for the Cauchy problem to the Kirchhoff equation and Kirchhoff systems with small data. Similar results will be obtained for the initial-boundary value problems in…

Analysis of PDEs · Mathematics 2014-12-30 Tokio Matsuyama , Michael Ruzhansky

We prove the well-posedness results of scattering data for the derivative nonlinear Schr\"odinger equation in $H^{s}(\mathbb{R})(s\geq\frac12)$. We show that the reciprocal of the transmission coefficient can be written as the sum of some…

Analysis of PDEs · Mathematics 2023-09-19 Weifang Weng , Zhenya Yan