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arXiv 1503.00746physics.chem-ph
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约化密度矩阵泛函理论中的广义Pauli约束

Generalized Pauli constraints in reduced density matrix functional theory

Iris Theophilou, Nektarios N. Lathiotakis, Miguel A. L. Marques, Nicole Helbig

摘要:

在Coleman系综$N$ -可表示性条件下,单体约化密度矩阵(1-RDM)的泛函通常被最小化。最近,纯态$N$ -可表示性条件,也被称为广义泡利约束,在发现了一种系统的方法来导出它们对于任何数量的电子和任何有限维的希尔伯特空间之后,受到了越来越多的关注。这项工作的目标是评估潜在的影响,实施的纯态条件的结果减少密度矩阵泛函理论计算。特别是,我们研究是否标准的最小化典型的1-RDM功能下的合奏$N$ -representability条件违反纯态条件的原型3电子系统。我们还强制执行纯态条件,除了合奏的,对于相同的系统和泛函和比较的相关能量和最佳职业数与那些通过单独执行合奏条件。

英文摘要:

Functionals of the one-body reduced density matrix (1-RDM) are routinely minimized under Coleman's ensemble $N$-representability conditions. Recently, the topic of pure-state $N$-representability conditions, also known as generalized Pauli constraints, received increased attention following the discovery of a systematic way to derive them for any number of electrons and any finite dimensionality of the Hilbert space. The target of this work is to assess the potential impact of the enforcement of the pure-state conditions on the results of reduced density-matrix functional theory calculations. In particular, we examine whether the standard minimization of typical 1-RDM functionals under the ensemble $N$-representability conditions violates the pure-state conditions for prototype 3-electron systems. We also enforce the pure-state conditions, in addition to the ensemble ones, for the same systems and functionals and compare the correlation energies and optimal occupation numbers with those obtained by the enforcement of the ensemble conditions alone.

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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