Aharonov-Bohm ring with fluctuating flux

2001/08/31 by Florian Marquardt, Christoph Bruder, C. Bruder · 1 citation
Physics and Astronomy · #Quantum and electron transport phenomena #Quantum optics and atomic interactions #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.65.125315

published as Phys. Rev. B 65, 125315 (2002) · 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

arxiv created 2002/02/27 · openalex publication_date 2002/03/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

We consider a noninteracting system of electrons on a clean one-channel Aharonov-Bohm ring that 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.

Citations

• Quantum tunnelling in a dissipative system

Cited by

• Many-fermion generalization of the Caldeira-Leggett model

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