An Efficient Parallel Algorithm for the Calculation of Unrestricted Canonical MP2 Energies
by Baker, J.; Wolinski, K.
We present details of our efficient implementation of full accuracy unrestricted open-shell second-order canonical Moller-Plesset (MP2) energies, both serial and parallel. The algorithm is based on our previous restricted closed-shell MP2 code using the Saebo-Almlof direct integral transformation. Depending on system details, UMP2 energies take from less than 1.5 to about 3.0 times as long as a closed-shell RMP2 energy on a similar system using the same algorithm. Several examples are given including timings for some large stable radicals with 90- atoms and over 3600 basis functions.
- Journal
- Journal of Computational Chemistry
- Volume
- 32
- Issue
- 15
- Year
- 2011
- Start Page
- 3304-3312
- URL
- https://dx.doi.org/10.1002/jcc.21924
- ISBN/ISSN
- 1096-987X; 0192-8651
- DOI
- 10.1002/jcc.21924