We consider a semi-classical nonlinear Schrodinger equation. For initial data causing focusing at one point in the linear case, we study a nonlinearity which is super-critical in terms of asymptotic effects near the caustic. We prove the existence of infinitely many phase shifts appearing at the approach of the critical time. This phenomenon is suggested by a formal computation. The rigorous proof shows a quantitatively different asymptotic behavior. We explain these aspects, and discuss some problems left open.
Finite-mass soliton-type rigidity and four-channel reduction for the three-dimensional nonradial focusing energy-critical nonlinear Schrödinger equation
Guangdong University of Education(广东教育学院);University of Louisville(路易斯维尔大学)
Coherent energy cascades in nonlinear disordered Hamiltonians
Instituto Galego de Física de Altas Enerxías, Universidade de Santiago de Compostela(加利西亚高能物理研究所,圣地亚哥-德孔波斯特拉大学);High Energy Physics Research Unit, Faculty of Science, Chulalongkorn University(朱拉隆功大学理学院高能物理研究组);Theoretische Natuurkunde, Vrije Universiteit Brussel (VUB) & International Solvay Institutes(布鲁塞尔自由大学理论物理系及国际索尔维研究所)
On the Classical Limit of the Schrödinger Equation
本文给出了WKB型初值下任意长有限时间区间上薛定谔方程经典极限的初等证明。我们只使用定相方法和Laptev-Sigal简单而优雅地构造Schr dinger型方程的参数化[A.拉普捷夫岛Sigal,Review of Math.Phys.12(2000),749-766]。我们还详细解释了使用Laptev-Sigal参数时获得的焦散线的相移与Maslov指数的关系。