Spin noise spectroscopy of quantum dot molecules

TL;DR

This paper demonstrates how spin noise spectroscopy can effectively characterize various parameters of quantum dot molecules, including interactions, decoherence, and structural properties, using spectral measurements.

Contribution

It introduces a method to extract detailed physical parameters of quantum dot molecules from spin noise spectra, highlighting its advantages and limitations.

Findings

All relevant QDM parameters can be determined from spin noise spectra.

Spin noise spectroscopy can measure tunneling amplitudes and interactions.

The method provides a non-invasive way to characterize quantum dot systems.

Abstract

We discuss advantages and limitations of the spin noise spectroscopy for characterization of interacting quantum dot systems on specific examples of individual singly and doubly charged quantum dot molecules (QDMs). It is shown that all the relevant parameters of the QDMs including tunneling amplitudes with spin-conserving and spin-non-conserving interactions, decoherence rates, Coulomb repulsions, anisotropic g-factors and the distance between the dots can be determined by measuring properties of the spin noise power spectrum.