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The authors compute the long-time asymptotics for solutions of the NLS equation just under the assumption that the initial data lies in a weighted Sobolev space. In earlier work (see e.g. [DZ1],[DIZ]) high orders of decay and smoothness are…

Analysis of PDEs · Mathematics 2007-05-23 P. Deift , X. Zhou

This work investigates the long-time asymptotic behaviors of the solution to the KdV equation with delta function initial profiles in different regions, employing the Riemann-Hilbert formulation and Deift-Zhou nonlinear steepest descent…

Analysis of PDEs · Mathematics 2025-03-31 Xuliang Liu , Deng-Shan Wang

We focused on the Ablowitz--Ladik equation on a zero background, specifically considering the scenario of $N$ pairs of multiple poles. Our first goal was to establish a mapping between the initial data and the scattering data. This allowed…

Exactly Solvable and Integrable Systems · Physics 2025-01-07 Huan Liu , Jing Shen , Xianguo Geng

In this paper, we investigate the long-time asymptotic behavior of the solution to the initial value problem for the modified Camassa-Holm (mCH) equation with cubic nonlinearity. The equation is known to be integrable, which we mean it…

Exactly Solvable and Integrable Systems · Physics 2019-12-02 Jian Xu , Engui Fan

We study the Cauchy problem for the reduced Maxwell-Bloch equations with initial data for the electric field in weighted Sobolev spaces, assuming that all atoms initially reside in their ground state. Using the d-bar steepest descent…

Analysis of PDEs · Mathematics 2025-05-23 Kang Wu , Jingsong He , Yingcan Huang

The purpose of the present paper is to develop the inverse scattering transform for the nonlocal semi-discrete nonlinear Schrodinger equation (known as Ablowitz-Ladik equation) with PT-symmetry. This includes: the eigenfunctions (Jost…

Exactly Solvable and Integrable Systems · Physics 2019-10-15 Georgi G. Grahovski , Amal J. Mohammed , Hadi Susanto

We investigate the long-time asymptotics for the defocusing integrable discrete nonlinear Schr\"odinger equation. If $|n|<2t$, we have decaying oscillation of order $O(t^{-1/2})$ as was proved in our previous paper. Near $|n|=2t$, the…

Mathematical Physics · Physics 2018-12-13 Hideshi Yamane

In this work, we mainly consider the Cauchy problem for the reverse space-time nonlocal Hirota equation with the initial data rapidly decaying in the solitonless sector. Start from the Lax pair, we first construct the basis Riemann-Hilbert…

Analysis of PDEs · Mathematics 2022-09-27 Wei-Qi Peng , Yong Chen

In this paper, we mainly focus on the Cauchy problem of an integrable nonlocal Hirota equation with initial value in weighted Sobolev space. Through the spectral analysis of Lax pairs, we successfully transform the Cauchy problem of the…

Analysis of PDEs · Mathematics 2022-06-20 Jin-yan Zhu , Yong Chen

In this paper we focus on the initial value problem for quasi-linear dissipative plate equation in multi-dimensional space $(n\geq2)$. This equation verifies the decay property of the regularity-loss type, which causes the difficulty in…

Analysis of PDEs · Mathematics 2010-03-16 Yongqin Liu , Shuichi Kawashima

In this article, we apply Deift-Zhou nonlinear steepest descent method to analyze the long-time asymptotic behavior of the solution for the discrete defocusing mKdV equation. This equation was proposed by Ablowitz and Ladik.

Analysis of PDEs · Mathematics 2020-01-08 Meisen Chen , En-Gui Fan

We study a very general class of first-order linear hyperbolic systems that both become weakly hyperbolic and contain lower-order coefficients that blow up at a single time $t = 0$. In "critical" weakly hyperbolic settings, it is well-known…

Analysis of PDEs · Mathematics 2025-06-16 Bolys Sabitbek , Arick Shao

The inverse scattering transform is developed to solve the Maxwell-Bloch system of equations that describes two-level systems with inhomogeneous broadening, in the case of optical pulses that do not vanish at infinity in the future. The…

Exactly Solvable and Integrable Systems · Physics 2024-11-12 Asela Abeya , Gino Biondini , Gregor Kovačič , Barbara Prinari

We study the Schwartz class of initial-boundary value (IBV) problems for the integrable Fokas-Lenells equation on the half-line via the Deift-Zhou's nonlinear descent method analysis of the corresponding Riemann-Hilbert problem such that…

Exactly Solvable and Integrable Systems · Physics 2017-12-14 Shuyan Chen , Zhenya Yan

The rigorous asymptotic analysis for the Riemann problem of the defocusing nonlinear Schr\"{o}dinger hydrodynamics is a very interesting problem with many challenges. To date, the full analysis of this problem remains open. In this work,…

Analysis of PDEs · Mathematics 2026-03-31 Deng-Shan Wang , Peng Yan

Based on the nonlinear steepest descent method of Deift and Zhou for oscillatory Riemann--Hilbert problems and the Dbar approach, the long-time asymptotic behavior of solutions to the fifth-order modified Korteweg-de Vries equation on the…

Analysis of PDEs · Mathematics 2019-12-30 Nan Liu , Mingjuan Chen , Boling Guo

In this paper, we study the initial-value problem for two first order systems in non-conservative form. The first system arises in elastodynamics and belongs to the class of strictly hyperbolic, genuinely nonlinear systems. The second…

Analysis of PDEs · Mathematics 2013-03-04 Anupam Pal Choudhury

We discuss the algebro-geometric initial value problem for the Ablowitz-Ladik hierarchy with complex-valued initial data and prove unique solvability globally in time for a set of initial (Dirichlet divisor) data of full measure. To this…

Exactly Solvable and Integrable Systems · Physics 2009-10-15 F. Gesztesy , H. Holden , J. Michor , G. Teschl

We consider the initial-value problem for the Sasa-Satsuma equation on the line with decaying initial data. Using a Riemann-Hilbert formulation and steepest descent arguments, we compute the long-time asymptotics of the solution in the…

Analysis of PDEs · Mathematics 2019-03-13 Lin Huang , Jonatan Lenells

We investigate the long-time asymptotics for the solutions to the Cauchy problem of defocusing modified Kortweg-de Vries (mKdV) equation with finite density initial data. The present paper is the subsequent work of our previous paper…

Analysis of PDEs · Mathematics 2023-07-06 Taiyang Xu , Zechuan Zhang , Engui Fan