Diagnostics of many-particle electronic states from non-stationary currents and residual charge

TL;DR

This paper introduces a method to identify many-particle electronic states in coupled quantum dots by analyzing non-stationary currents and charge dynamics, revealing state-dependent charge evolution and trapping effects.

Contribution

The study presents a novel approach for diagnosing electronic states through complex analysis of charge dynamics and non-stationary currents in Coulomb-correlated quantum dot systems.

Findings

Charge evolution depends on initial state properties.

Different time scales characterize charge kinetics.

Charge trapping occurs under specific transition rules.

Abstract

We propose the method for identifying many particle electronic states in the system of coupled quantum dots (impurities) with Coulomb correlations. We demonstrate that different electronic states can be distinguished by the complex analysis of localized charge dynamics and non-stationary characteristics. We show that localized charge time evolution strongly depends on the properties of initial state and analyze different time scales in charge kinetics for initially prepared singlet and triplet states. We reveal the conditions for existence of charge trapping effects governed by the selection rules for electron transitions between the states with different occupation numbers.