Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 145, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4958461
Keywords
-
Funding
- Royal Commission for the Exhibition of 1851
Ask authors/readers for more resources
Basis set incompleteness error and finite size error can manifest concurrently in systems for which the two effects are phenomenologically well-separated in length scale. When this is true, we need not necessarily remove the two sources of error simultaneously. Instead, the errors can be found and remedied in different parts of the basis set. This would be of great benefit to a method such as coupled cluster theory since the combined cost of n(occ)(6)n(virt)(4) could be separated into n(occ)(6) and n(virt)(4) costs with smaller prefactors. In this Communication, we present analysis on a data set due to Baardsen and co-workers, containing 2D uniform electron gas coupled cluster doubles energies for r(s) = 0.5, 1.0, and 2.0 a. u. at a wide range of basis set sizes and particle numbers. In obtaining complete basis set limit thermodynamic limit results, we find that within a small and removable error the above assertion is correct for this simple system. We then use this method to obtain similar results for the 3D electron gas at r(s) = 1.0, 2.0, and 5.0 a. u. and make comparison to the Ceperley-Alder quantum Monte Carlo results. This approach allows for the combination of methods which separately address finite size effects and basis set incompleteness error. Published by AIP Publishing.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available