Quantum Mechanical Methods - nwchemgit/nwchem GitHub Wiki Quantum Mechanical Methods Hartree-Fock (HF) Theory Density Functional Theory (DFT) Excited-State Calculations (CIS, TDHF, TDDFT) Real-time TDDFT Plane-Wave Density Functional Theory (plane-wave DFT) Tensor Contraction Engine: CI, MBPT, and CC MP2 Coupled Cluster Calculations Multiconfiguration SCF GW calculations