Tunable Fermi-Edge Resonance in an Open Quantum Dot
Mesoscale and Nanoscale Physics
2008-04-12 v2
Abstract
Resonant tunneling in an open mesoscopic quantum dot is proposed as a vehicle to realize a tunable Fermi-edge resonance with variable coupling strength. We solve the x-ray edge problem for a generic nonseparable scatterer and apply it to describe tunneling in a quantum dot. The tunneling current power law exponent is linked to the S-matrix of the dot. The control of scattering by varying the dot shape and coupling to the leads allows to explore a wide range of exponents. Transport properties, such as weak localization, mesoscopic conductance fluctuations, and sensitivity to Wigner-Dyson ensemble type, have their replicas in the Fermi-edge singularity.
Cite
@article{arxiv.cond-mat/0405383,
title = {Tunable Fermi-Edge Resonance in an Open Quantum Dot},
author = {D. A. Abanin and L. S. Levitov},
journal= {arXiv preprint arXiv:cond-mat/0405383},
year = {2008}
}
Comments
4 pages, 3 figures