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arXiv 1608.08930math.AP
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多重晶格中点缺陷的正则性和局部性

Regularity and Locality of Point Defects in Multilattices

Derek Olson, Christoph Ortner

摘要:

我们制定了一个模型的点缺陷嵌入在一个均匀的多晶格晶体与经验原子间的相互作用势。在一个自然的,声子稳定性的假设下,我们量化的衰减的远程弹性场与距离的缺陷。这些衰减估计是一个重要的组成部分,在量化近似误差的粗粒度模型和近似晶体缺陷的最佳数值方法的建设。

英文摘要:

We formulate a model for a point defect embedded in a homogeneous multilattice crystal with an empirical interatomic potential interaction. Under a natural, phonon stability assumption we quantify the decay of the long-range elastic fields with increasing distance from the defect. These decay estimates are an essential ingredient in quantifying approximation errors in coarse-grained models and in the construction of optimal numerical methods for approximating crystalline defects.

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