Journal Article Ppublish 13 citations
PubMed: 16197103 DOI: 10.1103/PhysRevLett.95.127203
Theoretical analysis of the transmission phase shift of a quantum dot in the presence of Kondo correlations.
Phys Rev Lett 95(12):127203
Authors: A Jerez, P Vitushinsky, M Lavagna
Affiliations
- European Synchrotron Radiation Facility, 6, rue Jules Horowitz, 38043 Grenoble Cedex 9, France.
Abstract
We study the effects of Kondo correlations on the transmission phase shift of a quantum dot coupled to two leads in comparison with the experimental determinations made by Aharonov-Bohm (AB) quantum interferometry. We propose here a theoretical interpretation of these results based on scattering theory combined with Bethe ansatz calculations. We show that there is a factor of 2 difference between the phase of the S-matrix responsible for the shift in the AB oscillations and the one controlling the conductance. Quantitative agreement is obtained with experimental results for two different values of the coupling to the leads.
MeSH
Physics, Quantum Dots