Wednesday, March 6, 2013

1303.1133 (Zhou Shi et al.)

Microwave "optical" conductance    [PDF]

Zhou Shi, Jing Wang, Azriel Z. Genack
We measure the transmission matrix for microwave radiation propagating through ensembles of random waveguides of di?erent lengths and scattering strength. We ?nd that the probability dis-tribution of the transmittance T, the analog of the electronic conductance, evolves from Gaussian to log-normal and passes through a one-sided log-normal distribution in the crossover to Anderson localization. This asymmetrical distribution obtained for an ensemble with a value of the dimen-sionless conductance g of 0.37 is explained within the framework of an intuitive Coulomb gas model for the eigenvalues of the transmission matrix.
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