השוואת שיטות

	צימוד אשכולות CCSD	תיאוריית ההפרעות של מולר-פלסט
תחום	מחשוב קוונטי	מחשוב קוונטי
משפחה	Machine learning	Machine learning
שנת המקור	1966	1934
הוגה השיטה	Jiri Cizek	Christian Möller and Milton Plesset
סוג	Electronic correlation method	Post-Hartree-Fock method
מקור מכונן	Cizek, J. (1966). On the correlation problem in atomic and molecular systems. Journal of Chemical Physics, 45, 4256–4266.	Möller, C., Plesset, M. S. (1934). Note on an approximation treatment for many-electron systems. Physical Review, 46, 618–622.
כינויים	CCSD, CCSD(T)	MP2, MP3, MP4
קשורות	3	3
תקציר	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.	Möller-Plesset perturbation theory is a post-Hartree-Fock method that systematically corrects the HF reference by treating electron correlation as a perturbation. Introduced in 1934, MP theory provides increasingly accurate energy estimates (MP2, MP3, MP4, ...) by expanding the correlation energy in orders of perturbation.