Imaging quasi-particle wavefunctions in quantum dots via tunneling spectroscopy

TL;DR

This paper demonstrates that Coulomb interactions significantly alter the quasi-particle wavefunctions in quantum dots, affecting tunneling spectroscopy images especially at low electron densities or high magnetic fields.

Contribution

It provides an exact solution showing how electron-electron interactions modify wavefunctions, advancing understanding of tunneling spectroscopy in correlated quantum systems.

Findings

Coulomb correlations cause notable deviations from single-particle wavefunctions.

Deviations are critical at low electron densities and high magnetic fields.

Exact solutions reveal the importance of many-body effects in quantum dot imaging.

Abstract

We show that in quantum dots the physical quantities probed by local tunneling spectroscopies, namely the quasi-particle wavefunctions of interacting electrons, can considerably deviate from their single-particle counterparts as an effect of Coulomb correlation. From the exact solution of the few-particle Hamiltonian for prototype dots, we find that such deviations are crucial to predict wavefunction images at low electron densities or high magnetic fields.