Interaction effects and charge quantization in single-particle quantum dot emitters
Strongly Correlated Electrons
2019-04-03 v2 Mesoscale and Nanoscale Physics
High Energy Physics - Theory
Abstract
We discuss a theoretical model of an on-demand single-particle emitter that employs a quantum dot, attached to an integer or fractional quantum Hall edge state. Via an exact mapping of the model onto the spin-boson problem we show that Coulomb interactions between the dot and the chiral quantum Hall edge state, unavoidable in this setting, lead to a destruction of precise charge quantization in the emitted wave-packet. Our findings cast doubts on the viability of this set-up as a single-particle source of quantized charge pulses. We further show how to use a spin-boson master equation approach to explicitly calculate the current pulse shape in this set-up.
Cite
@article{arxiv.1808.08240,
title = {Interaction effects and charge quantization in single-particle quantum dot emitters},
author = {Glenn Wagner and Dung X. Nguyen and Dmitry L. Kovrizhin and Steven H. Simon},
journal= {arXiv preprint arXiv:1808.08240},
year = {2019}
}
Comments
5+5 pages, 3 figures, fixed typos, update Supplement Material and update figure 2