Quenched dynamics of entangled states in correlated quantum dots

TL;DR

This paper investigates how entangled states in coupled quantum dots evolve over time using two theoretical methods, revealing how entanglement can be controlled and linked to pair correlations.

Contribution

It introduces a comparative analysis of two theoretical approaches to study entanglement dynamics in quantum dots and establishes a direct link between entanglement and pair correlations.

Findings

Entanglement can be dynamically controlled in quantum dots.

A direct correlation between concurrence and pair functions was found.

Different theoretical methods yield consistent insights into entanglement evolution.

Abstract

Time evolution of initially prepared entangled state in the system of coupled quantum dots has been analyzed by means of two different theoretical approaches: equations of motion for the all orders localized electron correlation functions, considering interference effects, and kinetic equations for the pseudo-particle occupation numbers with constraint on the possible physical states. Results obtained by means of different approaches were carefully analyzed and compared with each other. Revealed direct link between concurrence (degree of entanglement) and quantum dots pair correlation functions allowed us to follow the changes of entanglement during time evolution of the coupled quantum dots system. It was demonstrated that the degree of entanglement can be controllably tuned during the time evolution of quantum dots system.