Manipulation of Multipartite Entanglement in an Array of Quantum Dots

TL;DR

This paper explores generating and controlling multipartite entanglement in quantum-dot arrays via photon coupling, with implications for quantum information processing and entanglement dynamics.

Contribution

It introduces a method to generate W and W-like states in quantum dots and discusses controlling coupling to observe entanglement sudden death.

Findings

Successful generation of W and W-like states in quantum-dot arrays.

Control of coupling enables observation of entanglement sudden death.

Potential applications in quantum information processing.

Abstract

Multipartite entanglement is indispensable in the implementation of quantum technologies and the fundamental test of quantum mechanics. Here we study how the W state and W-like state may be generated in a quantum-dot array by controlling the coupling between an incident photon and the quantum dots on a waveguide. We also discuss how the coupling may be controlled to observe the sudden death of entanglement. Our work can find potential applications in quantum information processing.