Papers › The MRChem multiresolution analysis code for molecular electronic structure...
The MRChem multiresolution analysis code for molecular electronic structure calculations: performance and scaling properties
Peter Wind, Magnar Bjørgve, Anders Brakestad, Gabriel A. Gerez S., Stig Rune Jensen, Roberto Di Remigio Eikås, Luca Frediani
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MRChem is a code for molecular electronic structure calculations, based on a multiwavelet adaptive basis representation. We provide a description of our implementation strategy and several benchmark calculations. Systems comprising more than a thousand orbitals are investigated at the HF level of theory, with an emphasis on scaling properties. With our design, terms which formally scale quadratically with the system size, in effect have a better scaling because of the implicit screening introduced by the inherent adaptivity of the method: all operations are performed to the requested precision, which serves the dual purpose of minimizing the computational cost and controlling the final error precisely. Comparisons with traditional Gaussian-type orbitals based software, show that MRChem can be competitive with respect to performance.
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