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Numerical Nanostructure Modeling

机译:数值纳米结构建模

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摘要

In the Self-consistent Field Approximation (SFA) a many particle system of interacting electrons is approximated by a single electron interacting with the entire rest of the system by a electron-density dependent potential. This abstraction facilitates the decomposition of the Hamiltonian for the system of interacting particles into a sum of electron-density dependent non-interacting terms. The particle interactions are then resolved in an outer iteration to self-consistency of the Schroedinger-Poisson model. The abstractions in the SFA permit numerical simulations of many electron systems which are otherwise intractable. In particular, specifically preconditioned iterative eigenvalue solvers and multi-level algorithms can be combined effectively into very fast SFA-based many electron system simulators.
机译:在自洽场近似(SFA)中,相互作用的电子的许多粒子系统是通过单个电子与依赖于电子密度的电势与整个系统其余部分相互作用而近似的。这种抽象有助于将相互作用的粒子系统的哈密顿量分解为电子密度相关的非相互作用项之和。然后在外部迭代中将粒子相互作用解析为Schroedinger-Poisson模型的自洽性。 SFA中的抽象允许对许多电子系统进行数值模拟,否则这些电子系统将很难处理。特别是,可以将经过特殊预处理的迭代特征值求解器和多级算法有效地组合到基于SFA的非常快的许多电子系统模拟器中。

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