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arXiv 1004.0760gr-qc
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三维空间中测试场的双曲演化

Hyperboloidal evolution of test fields in three spatial dimensions

Anil Zenginoglu, Lawrence E. Kidder

摘要:

我们提出了一个干净的解决方案的外边界和辐射提取问题的3+1形式主义的双曲型偏微分方程在给定的背景下的数值实现。我们的方法是基于紧化在零无穷远双曲面scri固定坐标。我们报告数值测试的一个特定的例子标量波方程的闵可夫斯基和史瓦西背景。我们解决的问题,如非线性源函数,匹配,并在零无穷远的形式奇异项的评价,爱因斯坦方程的双曲面方法的实施。

英文摘要:

We present the numerical implementation of a clean solution to the outer boundary and radiation extraction problems within the 3+1 formalism for hyperbolic partial differential equations on a given background. Our approach is based on compactification at null infinity in hyperboloidal scri fixing coordinates. We report numerical tests for the particular example of a scalar wave equation on Minkowski and Schwarzschild backgrounds. We address issues related to the implementation of the hyperboloidal approach for the Einstein equations, such as nonlinear source functions, matching, and evaluation of formally singular terms at null infinity.

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