Sammenlign metoder

	Konfigurationsinteraktion	DMRG
Fagområde	Spektroskopi	Spektroskopi
Familie	Process / pipeline	Process / pipeline
Oprindelsesår	1960	1992
Ophavsperson	Clemens Roothaan	Steven White
Type	Computational method	Computational method
Oprindelig kilde	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.
Aliasser	CI, configuration interaction method, CI calculations	DMRG, density matrix renormalization, tensor network
Relaterede	3	3
Resumé	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.