Multipartite entanglement generation in coupled microcavity arrays

TL;DR

This paper explores how coupled microcavity arrays with quantum emitters can generate and sustain multipartite entanglement through tunable optical excitation and quantum bath engineering, advancing quantum photonic technologies.

Contribution

It introduces a numerical scheme for optimizing entanglement generation in large arrays and different entangled states, facilitating scalable quantum photonic applications.

Findings

Numerical scheme for excitation parameter optimization

Steady-state entanglement via quantum bath engineering

Potential for scalable quantum photonic devices

Abstract

We consider photonic arrays made from quantum emitters in optically coupled microcavities as a platform for entanglement generation. These offer a large degree of tunability with the possibility of site-selective optical excitation. Coherent pumping is considered to drive transitions between vacuum and entangled target states both in a time-dependent manner, and in a quantum bath engineering approach to create entanglement in the steady-state. We demonstrate a numerical scheme that allows to generalize the determination of excitation parameters to larger array sizes and different classes of entangled states. This study is a step towards using coupled cavity arrays as a hardware platform in novel quantum-photonic applications in quantum computing and quantum machine learning.