Sicgbahn recently presented a new direct Cl method which is applicable to the CAS SCF method. Instead of using configuration state functions as adopted by Siegbahn, we propose that Slater determinants should be used\_ The approach then needs no formula tape, the oneelectron coupling coefficients bei
A determinant based full configuration interaction program
β Scribed by Peter J. Knowles; Nicholas C. Handy
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 686 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0010-4655
No coin nor oath required. For personal study only.
β¦ Synopsis
The program FCI solves the Full Configuration Interaction (Full CI) problem of quantum chemistry, in which the electronic Schriidinger equation is solved exactly within a given one particle basis set. The Slater determinant based algorithm leads to highly efficient implementation on a vector computer, and has enabled Full CI calculations of dimension more than 10' to be performed.
π SIMILAR VOLUMES
A massively parallel version of the configuration interaction CI section of the Ε½ . COLUMBUS multireference singles and doubles CI MRCISD program system is described. In an extension of our previous parallelization work, which was Ε½ . based on message passing, the global array GA toolkit has now bee
A parallel full configuration interaction FCI code, implemented on a distributed memory MPP computer, has been modified in order to use a direct algorithm to compute the lists of mono-and biexcitations each time they are needed. We were able to perform FCI calculations on the ground state of the ace
## Abstract The allβelectron full configuration interaction (FCI) vertical excitation energies for some low lying valence and Rydberg excited states of BeH are presented in this article. A basis set of valence atomic natural orbitals has been augmented with a series of Rydberg orbitals that have be