Second order Moller-Plesset selective

Calculations on selected benchmark atoms and molecules (Be, Ne, LiH, HF, H2O) have revealed the great potential of the coupled-cluster R12 method. The CCSD(T)-R12 calculations on the 10-electron systems represent the most accurate calculations at this level to date. At the second-order Moller-Plesset level, explicitly correlated wave functions have provided accurate and reliable potential energy surfaces for systems such as the HF dimer and the H2O trimer. 

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