Nonlinear time-dependent one-dimensional Schroedinger equation with double well potential

Details Nonlinear time-dependent one-dimensional Schroedinger equation with double well potential Nonlinear time-dependent one-dimensional Schroedinger equation with double well potential

2002-12-05

arxiv.org/abs/math-ph/0212024v1

Physics

Mathematical Physics

Scientific paper

We consider time-dependent Schroedinger equations in one dimension with double well potential and an external nonlinear perturbation. If the initial state belongs to the eigenspace spanned by the eigenvectors associated to the two lowest eigenvalues then, in the semiclassical limit, we show that the reduction of the time-dependent equation to a 2-mode equation gives the dominant term of the solution with a precise estimate of the error. By means of this stability result we are able to prove the destruction of the beating motion for large enough nonlinearity.

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