Photon propagation in disordered dielectrics and electron localization in disordered conductors have been shown to be governed by the same physical phenomenon, coherent backscattering. The most recent developments in electron localization have focused on so-called "universal fluctuations" of the resistance of small devices. Lee et al. have pointed out that due to the buildup of correlation through multiple scattering, the conductance of a microscopic sample will fluctuate independently of its size and degree of disorder.
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