Enhancing quantum transduction via long-range waveguide mediated interactions between quantum emitters

TL;DR

This paper proposes a scalable solid-state quantum transducer using waveguide-coupled quantum dots to efficiently convert signals between low-frequency electric fields and optical photons, facilitating quantum internet applications.

Contribution

It introduces a novel scheme leveraging waveguide-mediated interactions between quantum dots to enhance quantum transduction efficiency and integration.

Findings

Demonstrates how engineered quantum dot interactions enable efficient electric-to-optical transduction.

Shows potential for integration into quantum internet nodes as a coherent interface.

Highlights scalability and solid-state platform advantages for quantum communication.

Abstract

Efficient transduction of electromagnetic signals between different frequency scales is an essential ingredient for modern communication technologies as well as for the emergent field of quantum information processing. Recent advances in waveguide photonics have enabled a breakthrough in light-matter coupling, where individual two-level emitters are strongly coupled to individual photons. Here we propose a scheme which exploits this coupling to boost the performance of transducers between low-frequency signals and optical fields operating at the level of individual photons. Specifically, we demonstrate how to engineer the interaction between quantum dots in waveguides to enable efficient transduction of electric fields coupled to quantum dots. Owing to the scalability and integrability of the solid-state platform, our transducer can potentially become a key building block of a quantum internet node. To demonstrate this, we show how it can be used as a coherent quantum interface between optical photons and a two-level system like a superconducting qubit.