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Stable and Efficient Quantum Mechanical Calculations with PUMA on Triclinic Lattices

机译:三斜晶格上PUMA的稳定高效量子力学计算

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In this paper we are concerned with the efficient approximation of the Schrodinger eigenproblem using an orbital-enriched flat-top partition of unity method on general triclinic cells. To this end, we generalize the approach presented in Albrecht et al. (Comput. Meth. Appl. Mech. Eng. 342:224-239, 2018) via a simple yet effective transformation approach and discuss its realization in the PUMA software framework. The presented results clearly show that the proposed scheme attains all convergence and stability properties presented in Albrecht et al. (Comput. Meth. Appl. Mech. Eng. 342:224-239,2018).
机译:在本文中,我们关注使用统一方法在一般三斜晶胞上​​富集轨道的平顶分区,对Schrodinger本征问题进行有效逼近。为此,我们概括了Albrecht等人提出的方法。 (Comput。Meth。Appl。Mech。Eng。342:224-239,2018)通过一种简单而有效的转换方法,并讨论了其在PUMA软件框架中的实现。给出的结果清楚地表明,所提出的方案具有Albrecht等人提出的所有收敛性和稳定性。 (计算方法应用机械工程学342:224-239,2018)。

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