Wednesday, March 20, 2013

1303.4661 (Vincent Beaud et al.)

Statistics of charge transport and unconventional time ordering    [PDF]

Vincent Beaud, Gian Michele Graf, Andrei V. Lebedev, Gordey B. Lesovik
The statistics of charge transport across a tunnel junction with energy-dependent scattering is investigated. A model with quadratic dispersion relation is discussed in general and, independently, in the two limiting cases of a large detector and of a linear dispersion relation. The measurement of charge takes place according to various protocols. It is found that, as a rule, the statistics is expressed by means of time-ordered current correlators, differing however from the conventional ones in the ordering prescription. Nevertheless binomial statistics is confirmed in all cases.
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