Two interacting particles in a disordered chain IV: Scaling of level curvatures
Disordered Systems and Neural Networks
2009-10-31 v1 Mesoscale and Nanoscale Physics
Strongly Correlated Electrons
Abstract
The curvatures of two-particle energy levels with respect to the enclosed magnetic flux in mesoscopic disordered rings are investigated numerically. We find that the typical value of the curvatures is increased by interactions in the localised regime and decreased in the metallic regime. This confirms a prediction by Akkermans and Pichard (Eur. Phys. J. B 1, 223 (1998)). The interaction-induced changes of the typical curvatures at different energies and disorder strengths exhibit one-parameter scaling with a conductance-like single parameter. This suggests that interactions could influence the conductance of mesoscopic systems similarly.
Keywords
Cite
@article{arxiv.cond-mat/9808138,
title = {Two interacting particles in a disordered chain IV: Scaling of level curvatures},
author = {Andre Wobst and Dietmar Weinmann},
journal= {arXiv preprint arXiv:cond-mat/9808138},
year = {2009}
}
Comments
9 pages, 7 figures. Other parts of the series: cond-mat/9706258, cond-mat/9801134, cond-mat/9808136