期刊
JOURNAL OF CHEMICAL PHYSICS
卷 134, 期 15, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3573373
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资金
- Grant Agency of the Czech Republic [203/07/0070, P208/10/P041]
- Academy of Sciences of the Czech Republic
A new version of the multireference Mukherjee's coupled cluster method with perturbative triexcitations has been formulated, which is based on the uncoupled approximation applied to the triples equation. In contrast to the method developed by Evangelista et al. [J. Chem. Phys. 132, 074107 (2010)], the proposed approach does not require to solve the equation for T-3 amplitudes iteratively, yet yields results of essentially the same quality. The method, abbreviated as MR MkCCSD(Tu), has been implemented in the ACES II program package and its assessment has been performed on the BeH2 model and on the tetramethyleneethane molecule. (C) 2011 American Institute of Physics. [doi:10.1063/1.3573373]
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