INTERMOLECULAR INTERACTIONS AND CORRELATION BETWEEN OPTICAL-TRANSITIONS IN DIFFERENT MOLECULES

An exact treatment of the interaction-induced correlations between opt ical transitions in different molecules is presented. In a pure fluid (or in its buffer solution), the correlation terms are found to be add itive with the conventional relaxation matrix elements. Same projectio n approach is used to study similar effects for molecules belonging to different species a and b. An exact solution derived for binary mixtu res is used to analyze the cross (ab)-terms in the case of two-line mi xing. At the binary collision regime, new spectral features of higher orders in density may appear due to the Intermolecular optical transit ion coherence.