Aharonov-Bohm ring with fluctuating flux
Abstract
Description
We consider a non-interacting system of electrons on a clean one-channel Aharonov-Bohm ring which is threaded by a fluctuating magnetic flux. The flux derives from a Caldeira-Leggett bath of harmonic oscillators. We address the influence of the bath on the following properties: one- and two-particle Green's functions, dephasing, persistent current and visibility of the Aharonov-Bohm effect in cotunneling transport through the ring. For the bath spectra considered here (including Nyquist noise of an external coil), we find no dephasing in the linear transport regime at zero temperature.
PACS numbers: 73.23.-b, 73.23.Hk, 73.23.Ra, 03.65.Yz
17 pages, 8 figures. To be published in PRB. New version contains minor corrections and additional discussion suggested by referee. A simple introduction to the basics of dephasing can be found at http://iff.physik.unibas.ch/~florian/dephasing/dephasing.html
17 pages, 8 figures. To be published in PRB. New version contains minor corrections and additional discussion suggested by referee. A simple introduction to the basics of dephasing can be found at http://iff.physik.unibas.ch/~florian/dephasing/dephasing.html