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JCC
2007
79views more  JCC 2007»
14 years 9 months ago
Interfacing Q-Chem and CHARMM to perform QM/MM reaction path calculations
Abstract: A hybrid quantum mechanical/molecular mechanical (QM/MM) potential energy function with HartreeFock, density functional theory (DFT), and post-HF (RIMP2, MP2, CCSD) capab...
H. Lee Woodcock III, Milan Hodoscek, Andrew T. B. ...
JCC
2008
67views more  JCC 2008»
14 years 9 months ago
Systematic investigation on the geometric dependence of the calculated nuclear magnetic shielding constants
: We perform a systematic examination on the dependence of the calculated nuclear magnetic shielding constants on the chosen geometry for a selective set of density functional meth...
Ying Zhang, Xin Xu, Yijing Yan
JCC
2007
151views more  JCC 2007»
14 years 9 months ago
New parallel algorithm for MP2 energy gradient calculations
Abstract: A new parallel algorithm has been developed for calculating the analytic energy derivatives of full accuracy second order Møller-Plesset perturbation theory (MP2). Its m...
Kazuya Ishimura, Peter Pulay, Shigeru Nagase
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JCC
2008
131views more  JCC 2008»
14 years 9 months ago
An optimized initialization algorithm to ensure accuracy in quantum Monte Carlo calculations
: Quantum Monte Carlo (QMC) calculations require the generation of random electronic configurations with respect to a desired probability density, usually the square of the magnitu...
Daniel R. Fisher, David R. Kent IV, Michael T. Fel...