Ray tracing is a well known technique to generate life-like images. Unfortunately, ray tracing complex scenes can require large amounts of CPU time and memory storage. Distributed memory parallel computers with large memory capacities and high processing speeds are ideal candidates to perform ray tr
An implementation of RI–SCF on parallel computers
✍ Scribed by Herbert A. Früchtl; Rick A. Kendall; Robert J. Harrison; Kenneth G. Dyall
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 153 KB
- Volume
- 64
- Category
- Article
- ISSN
- 0020-7608
No coin nor oath required. For personal study only.
✦ Synopsis
The resolution of the identity RI approximation to the Hartree᎐Fock method was implemented within the NWChem suite of ab initio programs for parallel computers. After a description of the method, a detailed account of the implementation is given. We present a sample calculation and compare its performance and accuracy to an ''exact'' direct SCF calculation. Problems and limitations of the method are also discussed.
📜 SIMILAR VOLUMES
The approximate 'resolution of the identity' second-order many-body perturbation theory method (RI-MP2) recently introduced by Feyereisen, Fitzgerald and Komornicki utilizes a combination of two-and three-center integrals to approximate the usual four-center two-electron repulsion integrals. Like th
A coarse-grain, parallel approach to direct Hartree-Fock calculations is presented and discussed. The suggested scheme allows for a near asymptotic speedup involving a very low parallelization overhead without compromising the vector performance of vector-parallel architectures. A shared-memory MIMD
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