Asymptotic preserving schemes for the Klein–Gordon equation in the non-relativistic limit regime

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• 作者：Erwan Faou (1)
  Katharina Schratz (1)
  
• 关键词：35C20 ; 65M12 ; 35L05
• 刊名：Numerische Mathematik
• 出版年：2014
• 出版时间：March 2014
• 年：2014
• 卷：126
• 期：3
• 页码：441-469
• 全文大小：818 KB
• 作者单位：Erwan Faou (1)
  Katharina Schratz (1)
  
  1. INRIA and ENS Cachan Bretagne, Avenue Robert Schumann, 35170, Bruz, France
  
• ISSN：0945-3245

文摘

We consider the Klein–Gordon equation in the non-relativistic limit regime, i.e. the speed of light $c$ tending to infinity. We construct an asymptotic expansion for the solution with respect to the small parameter depending on the inverse of the square of the speed of light. As the first terms of this asymptotic can easily be simulated our approach allows us to construct numerical algorithms that are robust with respect to the large parameter $c$ producing high oscillations in the exact solution.