@article { ISI:A1993MH74400065,
	title = {DYNAMIC MEAN-FIELD MODELS WITH CORRELATED MODES},
	journal = {JOURNAL OF CHEMICAL PHYSICS},
	volume = {99},
	year = {1993},
	month = {NOV 15},
	pages = {7916-7925},
	abstract = {We discuss a generalized dynamic mean-field method combining the advantages of explicit pair correlations and of configuration interaction. The approximate dynamical method, which we call time-dependent self-consistent-field configuration interaction (TDSCF2-CI), is constructed by including N(N-1)/2 TDSCF2 configurations. In each configuration a given pair of N coupled modes is directly (not in the mean-field approach) correlated; the N(N-1)/2 configurations include all such choices of pairs. As such, it has both the usual advantages of TDSCF and improvements due to some inclusion of correlations (exact results for any two-mode problem, improved descriptions of dynamical corrections, and greater accuracy). A three-mode model Hamiltonian is analyzed using five approximate treatments, i.e., the usual TDSCF, the three TDSCF2 forms, and the TDSCF2-CI one. The quantities for comparison with the exact results include the decay P(t) of the initial state, the time dependencies of the energies e (i) of individual modes, and the overlap S (t) of the corresponding approximate wave function with the exact one. We find, indeed, that explicit inclusion of pair correlations improves the description of the quantum dynamics of the system.},
	issn = {0021-9606},
	doi = {10.1063/1.465669},
	author = {Vekhter, B. and M.A. Ratner and Gerber, R. B.}
}
