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首页> 外文期刊>Chemical Physics Letters >Acceleration of fragment molecular orbital calculations with Cholesky decomposition approach
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Acceleration of fragment molecular orbital calculations with Cholesky decomposition approach

机译:利用Cholesky分解方法加速碎片分子轨道计算

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摘要

A novel method, Cholesky decomposition with adaptive metric (CDAM), is applied to the two-electron integral calculations in the fragment molecular orbital (FMO) method. We thus accelerate the Hartree-Fock and the second-order Moller-Plesset perturbation (MP2) energy calculations substantially. Especially, the MP2 part for fragment dimers, which is computationally expensive, is accelerated by a factor of about 10. The CDAM approximations would enable FMO-MP2 calculations to easily process multiple structure samples even including dynamics of large molecular systems and lead to next-generation high-performance computations where statistical samplings or free energy estimates would be important.
机译:一种新颖的方法,具有自适应度量的Cholesky分解(CDAM),被应用于碎片分子轨道(FMO)方法中的双电子积分计算。因此,我们大大加快了Hartree-Fock和二阶Moller-Plesset摄动(MP2)能量的计算。尤其是,用于片段二聚体的MP2部分的计算量很大,可提高约10倍。CDAM近似将使FMO-MP2计算能够轻松处理多个结构样本,甚至包括大分子系统的动力学,并导致下一步的发展。新一代高性能计算,其中统计采样或自由能估计将非常重要。

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