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首页> 外文期刊>Annales Henri Poincare >The NLS Limit for Bosons in a Quantum Waveguide
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The NLS Limit for Bosons in a Quantum Waveguide

机译:量子波导中玻色子的NLS极限

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We consider a system of N bosons confined to a thin waveguide, i.e. to a region of space within an -tube around a curve in . We show that when taking simultaneously the NLS limit and the limit of strong confinement , the time-evolution of such a system starting in a state close to a Bose-Einstein condensate is approximately captured by a non-linear Schrodinger equation in one dimension. The strength of the non-linearity in this Gross-Pitaevskii type equation depends on the shape of the cross-section of the waveguide, while the "bending" and the "twisting" of the waveguide contribute potential terms. Our analysis is based on an approach to mean-field limits developed by Pickl (On the time-dependent Gross-Pitaevskii-and Hartree equation., 2008).
机译:我们考虑由N个玻色子组成的系统,该系统局限于一个细波导中,也就是围绕在的曲线中的-管内的空间区域。我们表明,当同时采用NLS极限和强约束极限时,这种系统在接近Bose-Einstein凝聚物的状态下开始的时间演化被一维非线性Schrodinger方程近似捕获。在该Gross-Pitaevskii型方程中,非线性强度取决于波导横截面的形状,而波导的“弯曲”和“扭曲”则构成了潜在项。我们的分析基于Pickl提出的均值场极限方法(基于时间相关的Gross-Pitaevskii和Hartree方程,2008年)。

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