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arXiv 1502.04698physics.chem-phcond-mat.str-el
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从有效哈密顿量在最小基上修正量子化学

Correct quantum chemistry in a minimal basis from effective Hamiltonians

Thomas J. Watson, Garnet Kin-Lic Chan

摘要:

我们描述了如何创建从头算有效的哈密顿量,定性地描述正确的化学,即使在使用最小的基础。哈密尔顿算子是通过将相关性从一个大的父基折叠成一个小的或最小的目标基,使用正则变换的机器来获得的。我们证明了这些有效汉密尔顿的质量,可以正确捕获水、氮气和乙烯中的各种激发态,并描述氮气和铬二聚体中的基态和激发态键断裂,所有这些都在小或最小的基组中。

英文摘要:

We describe how to create ab-initio effective Hamiltonians that qualitatively describe correct chemistry even when used with a minimal basis. The Hamiltonians are obtained by folding correlation down from a large parent basis into a small, or minimal, target basis, using the machinery of canonical transformations. We demonstrate the quality of these effective Hamiltonians to correctly capture a wide range of excited states in water, nitrogen, and ethylene, and to describe ground and excited state bond-breaking in nitrogen and the chromium dimer, all in small or minimal basis sets.

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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