Entanglement dynamics and Mollow nonuplets between two coupled quantum dots in a nanowire photonic crystal system

TL;DR

This paper presents a nanowire photonic crystal system that enables controllable photon coupling between two distant quantum dots, revealing complex entanglement dynamics and unique resonance fluorescence spectra including Mollow nonuplets.

Contribution

It introduces a novel nanowire-based platform for mediating quantum dot interactions and demonstrates the emergence of long-lived entangled states and complex spectral features.

Findings

Long-lived entangled states between quantum dots

Observation of Mollow nonuplet spectra

Robustness against scattering loss

Abstract

We introduce a nanowire-based photonic crystal waveguide system capable of controllably mediating the photon coupling between two quantum dots which are macroscopically separated. Using a rigorous Green-function-based master equation approach, our two-dot system is shown to provide a wide range of interesting quantum regimes. In particular, we demonstrate the formation of long-lived entangled states and study the resonance fluorescence spectrum which contains clear signatures of the coupled quantum dot pair. Depending upon the operating frequency, one can obtain a modified Mollow triplet spectrum or a Mollow nonuplet, namely a spectrum with nine spectral peaks. These multiple peaks are explained in the context of photon-exchange-mediated dressed states. Results are robust with respect to scattering loss, and spatial filtering via propagation allows for each quantum dot's emission to be observed individually.