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	Hartree-Fock-metoden	Kopplad kluster CCSD
Ämnesområde	Kvantdatorteknik	Kvantdatorteknik
Familj	Machine learning	Machine learning
Ursprungsår	1928	1966
Upphovsperson	Douglas Hartree and Vladimir Fock	Jiri Cizek
Typ	Electronic structure method	Electronic correlation method
Ursprungskälla	Fock, V. (1930). Näherungsmethode zur Lösung des quantenmechanischen Mehrkörperproblems. Zeitschrift für Physik, 61, 126–148.	Cizek, J. (1966). On the correlation problem in atomic and molecular systems. Journal of Chemical Physics, 45, 4256–4266.
Alias	HF, self-consistent field	CCSD, CCSD(T)
Närliggande	4	3
Sammanfattning	The Hartree-Fock (HF) method is a foundational self-consistent field approach for solving the many-electron Schrödinger equation. Developed independently by Douglas Hartree and Vladimir Fock in the late 1920s, it approximates the ground state by assuming electrons move in an average field generated by all other electrons, enabling tractable quantum chemistry calculations.	Coupled Cluster theory, particularly CCSD (Singles and Doubles) and CCSD(T) with perturbative triples, is one of the most accurate methods for molecular electronic structure. Developed by Jiri Cizek in 1966, CC theory treats the ground state wave function as an exponential of excitation operators applied to the Hartree-Fock reference, enabling systematic treatment of electron correlation with guaranteed size consistency.