High-Frequency Wave Propagation by the Segment Projection Method

@article{Engquist2002HighFrequencyWP,
  title={High-Frequency Wave Propagation by the Segment Projection Method},
  author={Bj{\"o}rn Engquist and Olof Runborg and Anna-Karin Tornberg},
  journal={Journal of Computational Physics},
  year={2002},
  volume={178},
  pages={373-390}
}
Geometrical optics is a standard technique used for the approximation of high-frequency wave propagation. Computational methods based on partial differential equations instead of the traditional ray tracing have recently been applied to geometrical optics. These new methods have a number of advantages but typically exhibit difficulties with linear superposition of waves. In this paper we introduce a new partial differential technique based on the segment projection method in phase space. The… 
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