Journal of Chemical Physics, Vol.112, No.15, 6939-6939, 2000
Response to "Comment on ＇Frequency-dependent polarizabilities, hyperpolarizabilities, and excitation energies from time-dependent density-functional theory based on the quasienergy derivative method＇ " [J. Chem. Phys. 112, 6938 (2000)]
We replied to the comment by Banerjee and Harbola on our previous paper [J. Chem. Phys. 111, 2878 (1999)]. As their comment, the basic direction of our previous paper is similar to theirs [Phys. Lett. A 236, 525 (1997) and Eur. Phys. J. D 5, 201 (1999)]. However, there exist the significant differences between them concerning (1) the description of the exchange-correlation quasienergy functional, (2) the universality of the expression of hyperpolarizabilities, (3) the derivation of the expression for the excitation energies and transition moments, and (4) the orbital quasienergy matrix in the coupled-perturbed Kohn-Sham equation. (C) 2000 American Institute of Physics. [S0021-9606(00)30215-5].