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- W2153585659 abstract "The coupled cluster method (CCM) is a method of quantum many-body theory that may provide accurate results for the ground-state properties of lattice quantum spin systems even in the presence of strong frustration and for lattices of arbitrary spatial dimensionality. Here we present a significant extension of the method by introducing an approach that allows an efficient parallelization of computer codes that carry out high-order CCM calculations. We find that we are able to extend such CCM calculations by an order of magnitude higher than ever before utilized in a high-order CCM calculation for an antiferromagnet. Furthermore we use only a relatively modest number of processors, namely, eight. Such very high-order CCM calculations are possible only by using such a parallelized approach. An illustration of the new approach is presented for the ground-state properties of a magnetic material, ${mathrm{CaV}}_{4}{mathrm{O}}_{9}$." @default.
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- W2153585659 date "2005-11-15" @default.
- W2153585659 modified "2023-09-27" @default.
- W2153585659 title "High-order coupled cluster calculations via parallel processing: An illustration forCaV4O9" @default.
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- W2153585659 doi "https://doi.org/10.1103/physrevb.72.172408" @default.
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