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arXiv 1111.6263math-phmath.MP
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径向Dirac方程的稳定化有限元方法

Stabilized Finite Element Method for the Radial Dirac Equation

Hasan Almanasreh, Sten Salomonson, Nils Svanstedt

摘要:

数值求解径向狄拉克本征值问题的一个具有挑战性的困难是在正确的本征值中存在虚假的(非物理的)本征值,这些本征值既不与数学解释有关,也不与物理解释有关。已经进行了许多尝试,并且已经应用了几种数值方法来使用有限元法(FEM)、有限差分法(FDM)或其他数值方案来解决该问题。不幸的是,这些尝试中的大多数都未能克服困难。作为一种有限元方法,这项工作可以被视为第一个有前途的方案,以解决spuriousity问题完全。我们的方法是基于一个适当的选择试验和测试功能空间。我们发展了一个流线迎风Petrov-Galerkin方法(SUPG)的方程,并推导出一个显式的稳定性参数。

英文摘要:

A challenging difficulty in solving the radial Dirac eigenvalue problem numerically is the presence of spurious (unphysical) eigenvalues among the correct ones that are neither related to mathematical interpretations nor to physical explanations. Many attempts have been made and several numerical methods have been applied to solve the problem using finite element method (FEM), finite difference method (FDM), or other numerical schemes. Unfortunately most of these attempts failed to overcome the difficulty. As a FEM approach, this work can be regarded as a first promising scheme to solve the spuriousity problem completely. Our approach is based on an appropriate choice of trial and test functional spaces. We develop a Streamline Upwind Petrov-Galerkin method (SUPG) to the equation and derive an explicit stability parameter.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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