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arXiv 1008.0880physics.chem-phcond-mat.mtrl-sciphysics.comp-ph
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结合密度泛函理论和密度矩阵泛函理论

Combining Density Functional Theory and Density Matrix Functional Theory

Daniel R. Rohr, Julien Toulouse, Katarzyna Pernal

摘要:

我们将密度泛函理论与密度矩阵泛函理论结合起来,以获得两全其美的结果。这是通过电子相互作用的范围分离来实现的,其允许将短程密度泛函与长程密度矩阵泛函严格地结合。短程密度泛函近似于Perdew-Burke-Ernzerhof泛函(srPBE)的短程版本。长程密度矩阵泛函近似的Buijse-Baerends功能(lrBB)的长程版本。所得到的srPBE+lrBB方法准确地描述了静态和动态电子相关的计算成本类似的标准密度泛函近似。H $_{2}$、LiH、BH和HF分子的解离曲线显示了这一点。

英文摘要:

We combine density-functional theory with density-matrix functional theory to get the best of both worlds. This is achieved by range separation of the electronic interaction which permits to rigorously combine a short-range density functional with a long-range density-matrix functional. The short-range density functional is approximated by the short-range version of the Perdew-Burke-Ernzerhof functional (srPBE). The long-range density-matrix functional is approximated by the long-range version of the Buijse-Baerends functional (lrBB). The obtained srPBE+lrBB method accurately describes both static and dynamic electron correlation at a computational cost similar to that of standard density-functional approximations. This is shown for the dissociation curves of the H$_{2}$, LiH, BH and HF molecules.

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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