Applications of a perturbation-aware local correlation method to coupled cluster linear response properties
Applications of a perturbation-aware local correlation method to coupled cluster linear response properties
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扰动感知局部相关方法在耦合簇线性响应特性中的应用
DOI:
10.1080/00268976.2022.2112627
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发表时间:
2022
影响因子:
1.7
通讯作者:
Crawford, T. Daniel
中科院分区:
文献类型:
--
作者:
D'Cunha, Ruhee;Crawford, T. Daniel
We have investigated the efficacy of two recently proposed variations of the pair-natural-orbital approach to reducing the scaling of coupled cluster property calculations. In particular, we have extended our implementations of the PNO++ and combined PNO++ methods, which make use of field-aware pair-densities to define the virtual-orbital spaces used to describe electron correlation effects, in order to test their accuracy, efficiency, and robustness on larger molecular systems than previously investigated. For fluoroalkane chains up to 1-fluoroheptane we find that the PNO++ and combined PNO++ methods yield smaller truncation errors in response properties than PNO for similarly compact virtual spaces, and, while the PNO method performs better than the PNO++ method for correlation energies, the combined PNO++ method recovers similar accuracy for correlation energies to the PNO method. For more three-dimensional molecular structures such asα- andpinenes, the PNO, PNO++, and combined PNO++ methods all yield similar errors for response properties, whereas for (S)-1-phenylethanol, the PNO method performs slightly better than the other two approaches. We also investigate the use of a product density to define the virtual space, as well as two candidates for defining weak-pair contributions.
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影响因子:
5.5
作者:
Brabec, Jiri;Lang, Jakub;Demel, Ondrej
通讯作者:
Demel, Ondrej
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发表时间:
2004
期刊:
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作者:
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DOI:
10.1063/1.4818586
发表时间:
2013
期刊:
The Journal of chemical physics
影响因子:
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作者:
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通讯作者:
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DOI:
10.1021/acs.jpca.6b11410
发表时间:
2017
期刊:
The journal of physical chemistry. A
影响因子:
--
作者:
Ashutosh Kumar;T. Crawford
通讯作者:
T. Crawford