High Order Phase Fitted Multistep Integrators for the Schrödinger Equation with Improved Frequency Tolerance

Details High Order Phase Fitted Multistep Integrators for the Schrödinger Equation with Improved Frequency Tolerance High Order Phase Fitted Multistep Integrators for the Schrödinger Equation with Improved Frequency Tolerance

2008-11-15

arxiv.org/abs/0811.2478v1

Mathematics

Numerical Analysis

42 pages, 4 figures

Scientific paper

In this work we introduce a new family of 14-steps linear multistep methods for the integration of the Schr\"odinger equation. The new methods are phase fitted but they are designed in order to improve the frequency tolerance. This is achieved by eliminating the first derivatives of the phase lag function at the fitted frequency forcing the phase lag function to be '\textit{flat}' enough in the neighbor of the fitted frequency. The efficiency of the new family of methods is proved via error analysis and numerical applications.

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