Friday, March 29, 2013

1303.7042 (W. K. Hildebrand et al.)

Observation of infinite-range intensity correlations near the 3D
Anderson localization transition

W. K. Hildebrand, A. Strybulevych, S. E. Skipetrov, B. A. van Tiggelen, J. H. Page
We report measurements and theory for long-range intensity correlations near the Anderson transition of classical waves in a three-dimensional disordered material. Our ultrasonic experiments are designed to unambiguously detect a recently predicted infinite-range C0 contribution, due to local density of states fluctuations near the source. We find that these C0 correlations, in addition to C2 and C3 contributions, are significantly enhanced near mobility edges. Separate measurements of the inverse participation ratio reveal a link between C0 and the anomalous dimension \Delta_2, implying that C0 may also be used to explore the critical regime of the Anderson transition.
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