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The effects of surface scattering on quantum transport in thin films and wires are considered. A nontrivial channel-mixing problem arising from random boundary conditions is solved exactly by a new method that we present here. We find that the full quantum-mechanical treatment of very pure systems leads to results qualitatively different from those of currently used quasiclassical theory. Our theory explains some recent experimental observations.
Tešanović et al. (Mon,) studied this question.