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arXiv 2008.02678physics.chem-ph
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苯的基态电子能

The Ground State Electronic Energy of Benzene

Janus J. Eriksen, Tyler A. Anderson, J. Emiliano Deustua, Khaldoon Ghanem, Diptarka Hait, Mark R. Hoffmann, Seunghoon Lee, Daniel S. Levine, Ilias Magoulas, Jun… 展开作者

Janus J. Eriksen, Tyler A. Anderson, J. Emiliano Deustua, Khaldoon Ghanem, Diptarka Hait, Mark R. Hoffmann, Seunghoon Lee, Daniel S. Levine, Ilias Magoulas, Jun Shen, Norman M. Tubman, K. Birgitta Whaley, Enhua Xu, Yuan Yao, Ning Zhang, Ali Alavi, Garnet Kin-Lic Chan, Martin Head-Gordon, Wenjian Liu, Piotr Piecuch, Sandeep Sharma, Seiichiro L. Ten-no, C. J. Umrigar, Jürgen Gauss

摘要:

我们报告的调查结果的盲目挑战,致力于确定冻结的核心,全组态相互作用(FCI)的基态能量的苯分子在一个标准的相关一致的基础上设置双$ζ$质量。作为一个广泛的国际努力,我们的套件波函数为基础的相关方法共同代表了现代电子结构理论提供的高精度剧目的不同观点。在我们的评估中,评估的高层次的方法都发现定性同意最终的相关能量,大多数方法产生的FCI值的估计$-863$ m $E_{\text{H}}$左右。然而,我们发现从研究的方法的能量的均方根偏差是相当大的(1.3米$E_{\text{H}}$),这在光的赞誉性能的每个方法的较小的分子系统清楚地显示了面临的挑战,在扩展可靠的,近精确的相关方法,以更大的系统。虽然我们的研究所暴露的差异强调了一个事实,即目前最先进的方法仍有改进的余地,但我们仍然期望目前的评估能够为未来的基准和校准目的提供宝贵的社区资源。

英文摘要:

We report on the findings of a blind challenge devoted to determining the frozen-core, full configuration interaction (FCI) ground state energy of the benzene molecule in a standard correlation-consistent basis set of double-$ζ$ quality. As a broad international endeavour, our suite of wave function-based correlation methods collectively represents a diverse view of the high-accuracy repertoire offered by modern electronic structure theory. In our assessment, the evaluated high-level methods are all found to qualitatively agree on a final correlation energy, with most methods yielding an estimate of the FCI value around $-863$ m$E_{\text{H}}$. However, we find the root-mean-square deviation of the energies from the studied methods to be considerable (1.3 m$E_{\text{H}}$), which in light of the acclaimed performance of each of the methods for smaller molecular systems clearly displays the challenges faced in extending reliable, near-exact correlation methods to larger systems. While the discrepancies exposed by our study thus emphasize the fact that the current state-of-the-art approaches leave room for improvement, we still expect the present assessment to provide a valuable community resource for benchmark and calibration purposes going forward.

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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