Geometry, Statistics and Asymptotics of Quantum Pumps

Abstract

We give a pedestrian interpretation of a formula of Buttiker et. al. (BPT) relating the adiabatically pumped current to the S matrix and its (time) derivatives. We relate the charge in BPT to Berry's phase and the corresponding Brouwer pumping formula to curvature. As applications we derive explicit formulas for the joint probability density of pumping and conductance when the S matrix is uniformly distributed; and derive a new formula that describes hard pumping when the S matrix is periodic in the driving parameters.

RevTex, 4 pages, 2 figures

References in corpus (1)

• An Adiabatic Quantum Electron Pump

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