Proceedings PaperCollective phenomena in the interaction of radiation with matter
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The aim of this communication is to present in a concentrated from the main ideas of a method, developed by the author, for treating strongly nonequilibrium collective phenomena typical of the interaction of radiation with matter, as well as to give a survey of several applications of the method. The latter is called the Scale Separation Approach since its basic techniques rely on the possibility of separating different space-time scales in nonequilibrium statistical systems. This approach is rather general and can be applied to diverse physical problems, several of which are discussed here. These problems are: superradiance of nuclear spins, filamentation in resonant media, semiconfinement of neutral atoms, negative electric current,and collective liberation of light.