SUSCEPTIBILITIES IN THE REGION OF THE DISORDER-INDUCED CROSSING RESONANCE

We study the susceptibility matrix for the system of two wave fields o f different nature coupled by a random coupling parameter with zero me an value. It is shown that average properties of the system can be con sidered within the concept of two effective media that can be introduc ed in the same real material in order to describe properties of the fi elds. These two media have different characteristics and are independe nt in the sense that each of the averaged wave fields propagates throu gh its own effective medium without interaction with the partner wave field. Diagonal components of the susceptibility matrix demonstrate re sonance peculiarities caused by an interaction of the averaged wave of one nature with fluctuation waves of another nature. Relations betwee n positions of maxima of the susceptibilities and eigenfrequencies of the system are analyzed for different values of statistical characteri stics of the coupling parameter and initial relaxation parameters of t he corresponding waves.