arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1406.7797math.APnlin.SI
收藏

半经典极限下散焦非线性薛定谔方程的Initial-boundary value problems

Initial-boundary value problems for the defocusing nonlinear Schrödinger equation in the semiclassical limit

Peter D. Miller, Zhenyun Qin

摘要:

近年来,由于统一变换技术的发展,可积非线性偏微分方程的初边值问题变得容易处理。在实践中应用这些方法的主要障碍是,计算的初始和边界数据的谱变换需要太多的边界条件的知识,比所需的问题适定性。未知边界值的消除经常在谱域中通过所谓的全局关系来解决,并且可以求解全局关系的边界条件的类型被称为\emph{linearizable}。对于散焦的非线性薛定谔方程,整体关系式只在相当严格的情况下才能显式求解,即Dirichlet、Neumann和Robin(混合)型的齐次边界条件。一般的非齐次边界条件是不可线性化的。本文给出了由散焦非线性薛定谔方程提供的非线性Dirichlet-to-Neumann映射的一个显式逼近,并利用它给出了一般非齐次边值问题的近似解.我们的方法完全避开了全局关系的求解。我们的方法的准确性证明在半经典极限,我们提供了明确的渐近解的内部的四分之一平面空间-时域。

英文摘要:

Initial-boundary value problems for integrable nonlinear partial differential equations have become tractable in recent years due to the development of so-called unified transform techniques. The main obstruction to applying these methods in practice is that calculation of the spectral transforms of the initial and boundary data requires knowledge of too many boundary conditions, more than are required make the problem well-posed. The elimination of the unknown boundary values is frequently addressed in the spectral domain via the so-called global relation, and types of boundary conditions for which the global relation can be solved are called \emph{linearizable}. For the defocusing nonlinear Schrödinger equation, the global relation is only known to be explicitly solvable in rather restrictive situations, namely homogeneous boundary conditions of Dirichlet, Neumann, and Robin (mixed) type. General nonhomogeneous boundary conditions are not known to be linearizable. In this paper, we propose an explicit approximation for the nonlinear Dirichlet-to-Neumann map supplied by the defocusing nonlinear Schrödinger equation and use it to provide approximate solutions of general nonhomogeneous boundary value problems for this equation posed as an initial-boundary value problem on the half-line. Our method sidesteps entirely the solution of the global relation. The accuracy of our method is proven in the semiclassical limit, and we provide explicit asymptotics for the solution in the interior of the quarter-plane space-time domain.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑