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Construction of the Fock Matrix on a Grid-Based Molecular Orbital Basis Using GPGPUs
Sergio A Losilla1, Mark A Watson2, Alán Aspuru-Guzik3
1Department of Chemistry, University of Helsinki , P.O. Box 55, FIN-00014 Helsinki, Finland.
Abstract:
We present a GPGPU implementation of the construction of the Fock matrix in the molecular orbital basis using the fully numerical, grid-based bubbles representation. For a test set of molecules containing up to 90 electrons, the total Hartree-Fock energies obtained from reference GTO-based calculations are reproduced within 10(-4) Eh to 10(-8) Eh for most of the molecules studied. Despite the very large number of arithmetic operations involved, the high performance obtained made the calculations possible on a single Nvidia Tesla K40 GPGPU card.
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