Time ordering and counting statistics
Mesoscale and Nanoscale Physics
2015-05-13 v3 Mathematical Physics
math.MP
Abstract
The basic quantum mechanical relation between fluctuations of transported charge and current correlators is discussed. It is found that, as a rule, the correlators are to be time-ordered in an unusual way. Instances where the difference with the conventional ordering matters are illustrated by means of a simple scattering model. We apply the results to resolve a discrepancy concerning the third cumulant of charge transport across a quantum point contact.
Cite
@article{arxiv.0907.3848,
title = {Time ordering and counting statistics},
author = {S. Bachmann and G. M. Graf and G. B. Lesovik},
journal= {arXiv preprint arXiv:0907.3848},
year = {2015}
}
Comments
19 pages, 1 figure; inconsequential mistake and typos corrected