LASER-DRESSED MOLECULAR-INTERACTIONS AT LONG-RANGE

Dense and ultra-cold atomic gases are now commonly produced by laser c ooling and trapping techniques. In these gases, the long-range interac tions which are usually negligible become very important, and light-sh ifts also play an important role. In the present paper, we investigate the dominant cross-terms of long range interactions and light-shifts, and we discuss the consequences of these terms for collisions or opti cal lattices.