Av. Shtoff et al., Application of polynomial functions in calculations of optical susceptibilities of atoms and molecules by the Floquet method, OPT SPECTRO, 90(1), 2001, pp. 89-92
The role of polynomial terms included in trial many-electron wave functions
for variational calculations of the dynamic polarizabilities and hyperpola
rizabilities of atoms and molecules in the Floquet theory is examined. The
role of these terms is found to be very significant, and, in particular, po
lynomials of the first order are important in calculating the linear polari
zability. To obtain more reliable results in calculating the hyperpolarizab
ilites, it is necessary to include polynomials of higher orders. (C) 2001 M
AIK "Nauka/Interperiodica".