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A linear-scaling method for non-covalent interactions

preprint
submitted on 22.05.2019, 09:23 and posted on 22.05.2019, 15:28 by Robert Shaw, Grant Hill
A novel method for the accurate and efficient calculation of interaction energies in weakly-bound complexes comprised of a large number of molecules is presented. The new ALMO+RPAd method circumvents the prohibitive scaling of coupled cluster singles and doubles while still providing similar accuracy across a diverse range of intermolecular interactions. Tests on various dimers and the S66 benchmark set demonstrate results within 0.5 kcal/mol of coupled cluster singles and doubles results. On a large cluster of water molecules, we achieve calculations involving over 3500 orbital and 12000 auxiliary basis functions in under ten minutes on a single CPU core.

History

Email Address of Submitting Author

grant.hill@sheffield.ac.uk

Institution

University of Sheffield

Country

United Kingdom

ORCID For Submitting Author

0000-0002-6457-5837

Declaration of Conflict of Interest

The authors declare no conflicts of interest.

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