21 November 2012
Europe/Stockholm timezone

An algorithm for efficient evaluation of two-electron repulsion integrals over contracted Gaussian-type basis functions

21 Nov 2012, 10:40
20m

Speaker

Rosal Sandberg

Description

A new algorithm for the evaluation of two-electron repulsion integrals optimized for high contraction degrees is derived. Both the segmented and general contraction versions of the algorithm show significant theoretical performance gains over the asymptotically fastest algorithms published in the literature so far. A preliminary implementation of the algorithm shows good agreement with the theoretical results and demonstrates substantial average speed-ups in the evaluation of two-electron repulsion integrals over commonly used basis sets with varying degrees of contraction with respect to a mature, highly optimized quantum chemical code.

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