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Implementation of fictitious absorbing layers with deceleration effects for one-dimensional Schrödinger equations

Published online by Cambridge University Press:  01 October 2020

Hitoshi Kanai Open the ORCID record for Hitoshi Kanai [Opens in a new window]  and
Tomo Tatsuno
Hitoshi Kanai*
Affiliation:
Department of Computer and Network Engineering, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo182-8585, Japan
Tomo Tatsuno
Affiliation:
Department of Computer and Network Engineering, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo182-8585, Japan
*
†Email address for correspondence: [email protected]
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Abstract

Absorbing boundary conditions or layers are used in simulations to reduce or eliminate wave reflections from the boundary; one of the most widely used absorbing layers is Berenger's perfectly matched layer (PML). In this paper, PML is extended to a compound absorbing layer which has multiple effects of damping and deceleration, and is applied to linear and nonlinear Schrödinger equations. The deceleration extends the time to damp out the modes with higher phase velocities, leading to remarkably reduced total reflection for dispersive waves. By invoking the two effects independently, the flexibility and performance are enhanced. Since this method is based on the WKB formalism, it requires an absorbing layer of a moderate size.

Keywords

plasma simulationplasma waves
Type
Research Article
Information
Journal of Plasma Physics , Volume 86 , Issue 5 , October 2020 , 905860507
Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press

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