Charge transfer counting statistics revisited
介观与纳米尺度物理
2009-11-07 v2 超导电性
摘要
Charge transfer statistics of quantum particles is obtained by analysing the time evolution of the many-body wave function. Exploiting properly chosen gauge transformations, we construct the probabilities for transfers of a discrete number of particles. Generally, the derived formula for counting statistics differs from the one previously obtained by Levitov {\it et al.} (J. of Math. Phys. {\bf 37}, 4845 (1996)). The two formulae agree only if the initial state is prohibited from being a superposition of different charge states. Their difference is illustrated for cases of a single particle and a tunnel junction, and the role of charge coherence is demonstrated.
引用
@article{arxiv.cond-mat/0207343,
title = {Charge transfer counting statistics revisited},
author = {A. Shelankov and J. Rammer},
journal= {arXiv preprint arXiv:cond-mat/0207343},
year = {2009}
}
备注
Minor changes, as published (7 pages, LaTeX, epl-style)