Entanglement Dynamics of Two Independent Cavity-Embedded Quantum Dots

TL;DR

This paper models and analyzes the entanglement dynamics of two independent quantum dots embedded in separate micro-cavities, considering realistic loss mechanisms and dephasing, to understand their behavior in solid-state quantum systems.

Contribution

It introduces a comprehensive theoretical framework for entanglement evolution in two solid-state quantum dots within micro-cavities, including loss and dephasing effects, applicable to current experimental setups.

Findings

Entanglement decays over time due to cavity losses and dephasing.

The model accurately describes entanglement dynamics in realistic solid-state systems.

Insights into optimizing entanglement preservation in quantum dot micro-cavities.

Abstract

We investigate the dynamical behavior of entanglement in a system made by two solid-state emitters, as two quantum dots, embedded in two separated micro-cavities. In these solid-state systems, in addition to the coupling with the cavity mode, the emitter is coupled to a continuum of leaky modes providing additional losses and it is also subject to a phonon-induced pure dephasing mechanism. We model this physical configuration as a multipartite system composed by two independent parts each containing a qubit embedded in a single-mode cavity, exposed to cavity losses, spontaneous emission and pure dephasing. We study the time evolution of entanglement of this multipartite open system finally applying this theoretical framework to the case of currently available solid-state quantum dots in micro-cavities.