The energy spectrum and the optical absorption spectrum of [C.sub.60] fullerene within the Hubbard model

Anticommutator Green's functions and the energy spectrum of [C.sub.60] fullerene are calculated in the approximation of static fluctuations within the Hubbard model. On the basis of this spectrum, an interpretation is proposed for the experimentally observed optical absorption bands of [C.sub.60] fullerene. The parameters of [C.sub.60] fullerene that characterize it within the Hubbard model are calculated by the optical absorption spectrum.