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JHEP11(2009)014 doi: 10.1088/1126-6708/2009/11/014
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Abstract. We compute AC electrical transport at quantum Hall critical points, as modeled by intersecting branes and gauge/gravity duality. We compare our results with a previous field theory computation by Sachdev, and find unexpectedly good agreement. We also give general results for DC Hall and longitudinal conductivities valid for a wide class of quantum Hall transitions, as well as (semi)analytical results for AC quantities in special limits. Our results exhibit a surprising degree of universality; for example, we find that the high frequency behavior, including subleading behavior, is identical for our entire class of theories.
Key words: AdS-CFT Correspondence; Intersecting branes models; Gauge-gravity correspondence
E-print number: 0905.4538
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