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arXiv 2207.04151math.APmath-phmath.MP
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直线上非局部薛定谔方程整体解的存在性

Existence of global solutions to the nonlocal Schrödinger equation on the line

Yi Zhao, Engui Fan

摘要:

本文讨论了可积非局部非线性薛定谔方程初值为$q_0(x)\in H^{1,1}(\R)$的Cauchy问题在$L^1(\R)$小范数假设下整体解的存在性.我们严格证明了非局部NLS方程的谱问题不存在特征值和共振,并且在$L^1(\R)$小范数假设下,Zhou消失引理是有效的.利用逆散射理论和Riemann-Hilbert方法,严格地建立了从初始值到反射系数的正、逆散射映射的双射性和Lipschitz连续性,利用重构公式和反射系数的Plemelj投影估计,进一步得到了局部解的存在性和先验估计,从而保证了非局部NLS方程Cauchy问题整体解的存在性。

英文摘要:

In this paper, we address the existence of global solutions to the Cauchy problem for the integrable nonlocal nonlinear Schrödinger (nonlocal NLS) equation with the initial data $q_0(x)\in H^{1,1}(\R)$ with the $L^1(\R)$ small-norm assumption. We rigorously show that the spectral problem for the nonlocal NLS equation admits no eigenvalues or resonances, as well as Zhou vanishing lemma is effective under the $L^1(\R)$ small-norm assumption. With inverse scattering theory and the Riemann-Hilbert approach, we rigorously establish the bijectivity and Lipschitz continuous of the direct and inverse scattering map from the initial data to reflection coefficients.By using reconstruction formula and the Plemelj projection estimates of reflection coefficients,we further obtain the existence of the local solution and the priori estimates, which assure the existence of the global solution to the Cauchy problem for the nonlocal NLS equation.

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