Persistent current noise
Mesoscale and Nanoscale Physics
2010-12-23 v1
Abstract
We demonstrate that persistent current in meso- and nanorings may fluctuate down to zero temperature provided the current operator does not commute with the total Hamiltonian of the system. For a model of a quantum particle on a ring we explicitly evaluate PC noise power which has a form of sharp peaks which become broadened for multi-channel rings or in the presence of dissipation. PC noise can be tuned by an external magnetic flux which is a fundamental manifestation of quantum coherence in the system.
Keywords
Cite
@article{arxiv.1012.4846,
title = {Persistent current noise},
author = {Andrew G. Semenov and Andrei D. Zaikin},
journal= {arXiv preprint arXiv:1012.4846},
year = {2010}
}
Comments
4 pages, 1 figure