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arXiv 0906.2296math.APmath-phmath.MP
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多维半经典Schrödinger-Poisson方程组的大时间WKB逼近

Large time WKB approximation for multi-dimensional semiclassical Schrödinger-Poisson system

Satoshi Masaki

摘要:

本文考虑具有WKB型特殊初值的半经典Schrödinger-Poisson方程组,使得极限流体动力学方程的解至少在三维上是时间整体的.通过对可压缩欧拉-泊松方程的分析,我们给出了一个聚焦情况下的初始数据的例子。这个例子是一个具有径向对称性的大数据,并且超出了先前结果的范围,因为相位部分衰减得太慢。在这个方向上扩展以前的结果,我们证明WKB近似的解决方案与此数据为任意大的间隔$\R_+$。

英文摘要:

We consider the semiclassical Schrödinger-Poisson system with a special initial data of WKB type such that the solution of the limiting hydrodynamical equation becomes time-global in dimensions at least three. We give an example of such initial data in the focusing case via the analysis of the compressible Euler-Poisson equations. This example is a large data with radial symmetry, and is beyond the reach of the previous results because the phase part decays too slowly. Extending previous results in this direction, we justify the WKB approximation of the solution with this data for an arbitrarily large interval of $\R_+$.

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。

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