Coupled Cluster Theory · The Gold Standard of Quantum Chemistry
unseel.com · e^T̂ ansatz · CCSD(T) · size-consistency
ansatz |Φ₀⟩
level Hartree–Fock
error
step
occupied orbitals (electrons)
virtual orbitals
T̂₁ singles · T̂₂ doubles
e^T̂ disconnected quadruples
chemical accuracy ≈1 kJ/mol
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