Quantitative aspects of entanglement in the optically driven quantum dots

TL;DR

This paper introduces a new method to analyze maximum entanglement in coupled quantum dots driven by a laser, revealing two pathways to achieve it and showing how decoherence affects entanglement decay.

Contribution

It provides a novel approach to identify maximum entanglement in quantum dot systems and offers detailed insights into their coupled dynamics and entanglement generation mechanisms.

Findings

Maximum entanglement can be achieved via off-resonance interaction.

Weak field limit also enables maximum entanglement.

Decoherence causes decay of entanglement over time.

Abstract

We present a novel approach to look for the existence of maximum entanglement in a system of two identical quantum dots coupled by the Forster process and interacting with a classical laser field. Our approach is not only able to explain the existing treatments, but also provides further detailed insights into the coupled dynamics of quantum dots systems. The result demonstrates that there are two ways for generating maximum entangled states, one associated with far off-resonance interaction, and the other associated with the weak field limit. Moreover, it is shown that exciton decoherence results in the decay of entanglement.