Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 146, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4979993
Keywords
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Funding
- U.S. National Science Foundation [CHE-1362655, ACI-1047696, ACI-1450262]
- Camille and Henry Dreyfus Foundation
- Max Planck Society
- DFG [SPP 1601]
- cluster of excellence (RESOLV, University of Bochum) [EXC 1069]
- Fonds der Chemischen Industrie
- DOE Office of Science User Facility [DE-AC02-06CH11357]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1362655] Funding Source: National Science Foundation
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In this work, we present a linear scaling formulation of the coupled-cluster singles and doubles with perturbative inclusion of triples (CCSD(T)) and explicitly correlated geminals. The linear scaling implementation of all post-mean-field steps utilizes the SparseMaps formalism [P. Pinski et al., J. Chem. Phys. 143, 034108 (2015)]. Even for conservative truncation levels, the method rapidly reaches near-linear complexity in realistic basis sets, e.g., an effective scaling exponent of 1.49 was obtained for n-alkanes with up to 200 carbon atoms in a def2-TZVP basis set. The robustness of the method is benchmarked against the massively parallel implementation of the conventional explicitly correlated coupled-cluster for a 20-water cluster; the total dissociation energy of the cluster (similar to 186 kcal/mol) is affected by the reduced scaling approximations by only similar to 0.4 kcal/mol. The reduced scaling explicitly correlated CCSD(T) method is used to examine the binding energies of several systems in the L7 benchmark data set of noncovalent interactions. Published by AIP Publishing.
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