ASYMPTOTIC BEHAVIOUR FOR SCHR ODINGER EQUATIONS WITH A QUADRATIC NONLINEARITY IN ONE-SPACE DIMENSION
ASYMPTOTIC BEHAVIOUR FOR SCHR ODINGER EQUATIONS WITH A QUADRATIC NONLINEARITY IN ONE-SPACE DIMENSION
复制标题
一维二次非线性 SCHR ODINGER 方程的渐近行为
DOI:
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发表时间:
2001
期刊:
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通讯作者:
P. Naumkin
中科院分区:
文献类型:
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作者:
N. Hayashi;P. Naumkin
We consider the Cauchy problem for the Schrodinger equation with a quadratic nonlinearity in one space dimension iut + 1 uxx = t juxj 2 ; u(0;x) = u0(x); where 2 (0; 1). From the heuristic point of view, solutions to this problem should have a quasilinear character when 2 (1=2; 1). We show in this paper that the solutions do not have a quasilinear character for all 2 (0; 1) due to the special structure of the nonlinear term. We also prove that for 2 (1=2; 1) if the initial data u0 2 H 3;0 \ H 2;2 are small, then the solution has a slow time decay such as t = 2 . For 2 (0; 1=2), if we assume that the initial data u0 are analytic and small, then the same time decay occurs.