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	Konfigurationsinteraktion	DMRG
Ämnesområde	Spektroskopi	Spektroskopi
Familj	Process / pipeline	Process / pipeline
Ursprungsår	1960	1992
Upphovsperson	Clemens Roothaan	Steven White
Typ	Computational method	Computational method
Ursprungskälla	Roothaan, C. C. J. (1960). New developments in molecular orbital theory. Reviews of Modern Physics, 32(2), 179-185.	White, S. R. (1992). Density matrix formulation for quantum renormalization groups. Physical Review Letters, 69(19), 2863-2866.
Alias	CI, configuration interaction method, CI calculations	DMRG, density matrix renormalization, tensor network
Närliggande	3	3
Sammanfattning	Configuration Interaction (CI) is a post-Hartree-Fock quantum chemistry method that improves upon mean-field molecular orbital theory by treating electron correlation through a linear combination of electronic configurations. Introduced by Roothaan in 1960, CI corrects for the fundamental limitation of single-determinant theory by allowing the wavefunction to be a superposition of excited-state Slater determinants, systematically accounting for electron-electron interactions.	Density Matrix Renormalization Group (DMRG) is a powerful computational method for solving strongly correlated quantum systems, particularly one-dimensional lattice models and quantum chemistry problems. Introduced by White in 1992, DMRG uses a variational approach and tensor-network representation to efficiently describe quantum ground states and excitations, achieving numerical accuracy competitive with exact diagonalization for systems that other methods cannot treat.