Justification of the Coupled Mode Asymptotics for Localized Wavepackets in the Periodic Nonlinear Schr\"odinger Equation
Justification of the Coupled Mode Asymptotics for Localized Wavepackets in the Periodic Nonlinear Schr\"odinger Equation
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周期性非线性薛定格方程中局域波包耦合模渐近的证明
DOI:
10.1016/j.jmaa.2017.01.039
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
L. Helfmeier
中科院分区:
文献类型:
--
作者:
T. Dohnal;L. Helfmeier
We consider wavepackets composed of two modulated carrier Bloch waves with opposite group velocities in the one dimensional periodic Nonlinear Schrödinger/Gross–Pitaevskii equation. These can be approximated by first order coupled mode equations (CMEs) for the two slowly varying envelopes. Under a suitably selected periodic perturbation of the periodic structure the CMEs possess a spectral gap of the corresponding spatial operator and allow families of exponentially localized solitary waves parametrized by velocity. This leads to a family of approximate solitary waves in the periodic nonlinear Schrödinger equation. Besides a formal derivation of the CMEs a rigorous justification of the approximation and an error estimate in the supremum norm are provided. Several numerical tests corroborate the analysis.
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影响因子:
1.7
作者:
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通讯作者:
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DOI:
10.1109/jstqe.2008.918669
发表时间:
2008-06
影响因子:
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DOI:
--
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2001
期刊:
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