Symmetry-induced enhancement of transmission through a disordered system

The authors show here that the transmission of a slab-barrier-slab system with mirror-symmetric disorder is controlled by the barrier transparency renormalized due to the interference of waves propagating along symmetrical paths. A transport equation is derived for the correlation function of these waves, which is a tool for taking into account the disorder symmetry breaking and describing the crossover between exact and broken symmetry. The developed formalism enables explaining all aspects of the enhanced transmission effect has found previously in full wave numerical simulations.