Open Boundaries for the Nonlinear Schrodinger Equation

Details Open Boundaries for the Nonlinear Schrodinger Equation Open Boundaries for the Nonlinear Schrodinger Equation

2006-09-06

arxiv.org/abs/math/0609183v2

Journal of Computational Physics, Volume 225, Issue 2 (August 2007),Pages 1218-1232, SSN:0021-9991

Mathematics

Numerical Analysis

21 pages, 4 figures

Scientific paper

10.1016/j.jcp.2007.01.020

We present a new algorithm, the Time Dependent Phase Space Filter (TDPSF) which is used to solve time dependent Nonlinear Schrodinger Equations (NLS). The algorithm consists of solving the NLS on a box with periodic boundary conditions (by any algorithm). Periodically in time we decompose the solution into a family of coherent states. Coherent states which are outgoing are deleted, while those which are not are kept, reducing the problem of reflected (wrapped) waves. Numerical results are given, and rigorous error estimates are described. The TDPSF is compatible with spectral methods for solving the interior problem. The TDPSF also fails gracefully, in the sense that the algorithm notifies the user when the result is incorrect. We are aware of no other method with this capability.

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