Capacitance spectroscopy in quantum dots: Addition spectra and decrease of tunneling rates

TL;DR

This paper presents a theoretical analysis of single electron capacitance spectroscopy in quantum dots, providing insights into addition spectra and the reduction of tunneling rates, using exact diagonalizations and Hartree-Fock methods.

Contribution

It offers a detailed theoretical approach to understanding addition spectra and tunneling rate decrease in quantum dots, aligning with experimental observations.

Findings

Addition spectra for up to 15 electrons match experimental data

Spectral weight function explains tunneling rate decrease

Theoretical methods clarify unresolved aspects of quantum dot spectroscopy

Abstract

A theoretical study of single electron capacitance spectroscopy in quantum dots is presented. Exact diagonalizations and the unrestricted Hartree-Fock approximation have been used to shed light over some of the unresolved aspects. The addition spectra of up to 15 electrons is obtained and compared with the experiment. We show evidence for understanding the decrease of the single electron tunneling rates in terms of the behavior of the spectral weight function. (To appear in Phys. Rev. B (Rapid Comm.))