Reference electronic structure calculations in one dimension.

Reference electronic structure calculations in one dimension.
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一维参考电子结构计算。

DOI:
10.1039/c2cp24118h
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发表时间:
2012
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
通讯作者:
S. White
S. White
中科院分区:
--
文献类型:
--
作者:
Lucas Wagner;E. Stoudenmire;K. Burke;S. White

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大的强关联体系对现代电子结构方法提出了挑战,因为标准密度泛函通常会失败,而传统的量子化学方法要求太高。密度矩阵重整化群方法是求解这类系统的一个非常强大的工具,最近已经扩展到处理实空间网格上的长程相互作用,但在一维中最有效,它可以提供基本上任意的精度。这样的一维系统,因此提供了一个理论实验室研究强相关性和发展密度泛函近似处理强相关性,如果他们模仿三维现实足够接近。我们证明了这是事实,并提供参考数据的精确和标准的近似方法,在这方面的未来使用。
Large strongly correlated systems provide a challenge to modern electronic structure methods, because standard density functionals usually fail and traditional quantum chemical approaches are too demanding. The density-matrix renormalization group method, an extremely powerful tool for solving such systems, has recently been extended to handle long-range interactions on real-space grids, but is most efficient in one dimension where it can provide essentially arbitrary accuracy. Such 1d systems therefore provide a theoretical laboratory for studying strong correlation and developing density functional approximations to handle strong correlation, if they mimic three-dimensional reality sufficiently closely. We demonstrate that this is the case, and provide reference data for exact and standard approximate methods, for future use in this area.
使用扩展哈伯德模型近似远程相互作用系统中的空间和局部纠缠的可行性
DOI: 10.48550/arxiv.1007.5441
发表时间: 2010
期刊: --
影响因子: --
作者:
Coe J
通讯作者: Coe J