Exact results on linear response of cyclic molecular aggregates
arXiv:cond-mat/9509040
Abstract
Basing on the picture of Frenkel excitons in molecular crystals described by the XY-model we consider the linear response of linear cyclic aggregates at finite temperature. The exact results for characteristics of the response are obtained. In particular, we calculate time-dependent two-point correlation functions at finite temperature for the cyclic 1-D XY-model.
LaTeX, 23 pages. few misprints were corrected