Critical Test of Isotropic Periodic Sum Techniques with Group-based Cut-off Schemes
Affiliations
Truncation is still chosen for many long-range intermolecular interaction calculations to efficiently compute free-boundary systems, macromolecular systems and net-charge molecular systems, for example. Advanced truncation methods have been developed for long-range intermolecular interactions. Every truncation method can be implemented as one of two basic cut-off schemes, namely either an atom-based or a group-based cut-off scheme. The former computes interactions of "atoms" inside the cut-off radius, whereas the latter computes interactions of "molecules" inside the cut-off radius. In this work, the effect of group-based cut-off is investigated for isotropic periodic sum (IPS) techniques, which are promising cut-off treatments to attain advanced accuracy for many types of molecular system. The effect of group-based cut-off is clearly different from that of atom-based cut-off, and severe artefacts are observed in some cases. However, no severe discrepancy from the Ewald sum is observed with the extended IPS techniques.
Eliwa D, Kabbash A, El-Aasr M, Tawfik H, El-Saber Batiha G, Mahmoud M Molecules. 2023; 28(4).
PMID: 36838572 PMC: 9963078. DOI: 10.3390/molecules28041583.
Wu X, Brooks B J Chem Phys. 2019; 150(21):214109.
PMID: 31176325 PMC: 6551215. DOI: 10.1063/1.5097560.
A fast and accurate computational method for the linear-combination-based isotropic periodic sum.
Takahashi K, Nozawa T, Yasuoka K Sci Rep. 2018; 8(1):11880.
PMID: 30089878 PMC: 6082916. DOI: 10.1038/s41598-018-30364-2.