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arXiv 2402.08776physics.chem-ph
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使用运动方程耦合簇理论评估冻结自然轨道和带隙:以聚并苯和反式聚乙炔为例

An assessment of frozen natural orbitals and band gaps using equation of motion coupled cluster theory: a case study on polyacene and trans-polyacetylene

Zachary W. Windom, AV Lam, Ajith Perera, Rodney J. Bartlett

AI总结:

本研究利用冻结自然轨道(FNOs)增强 IP/EA-EOM-CCSD 计算,高效评估了聚并苯和反式聚乙炔的带隙,发现其误差可调且大幅降低了计算核心小时数。

摘要:

冻结自然轨道(FNOs)被用于增强旨在计算反式聚乙炔和聚并苯带隙的 IP/EA-EOM-CCSD 计算。我们展示了由此产生的电子亲和势(EAs)、电离势(IPs)和外推带隙所产生的误差在很大程度上可调节至所需精度,且与相应的完整计算相比,所需的 CPU 核心小时数减少了多个数量级。此外,还研究了各种 FNO 截断方案与(cc-pV$n$Z)基组之间的关系。

英文摘要:

Frozen natural orbitals (FNOs) are used to augment IP/EA-EOM-CCSD calculations targeting the band gap of trans-polyacetylene and polyacene. We show the resulting electron affinities (EAs), ionization potentials (IPs), and extrapolated band gaps incur errors that are largely tunable to a desired accuracy, yet require many orders of magnitude fewer core-hours as compared to the corresponding full calculation. The relationship between various FNO truncation schemes and (cc-pV$n$Z) basis set is also examined.

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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