Entanglement over global distances via quantum repeaters with satellite links

TL;DR

This paper proposes a satellite-based quantum repeater system with ground stations to enable entanglement over global distances, surpassing the limitations of fiber optics and distant satellites.

Contribution

It introduces a novel satellite-ground quantum repeater architecture that significantly extends entanglement distribution range.

Findings

Enables entanglement over distances unreachable by fiber optics.

Uses low-earth orbit satellites with entangled photon sources.

Achieves viable entanglement rates over global scales.

Abstract

We study entanglement creation over global distances based on a quantum repeater architecture that uses low-earth orbit satellites equipped with entangled photon sources, as well as ground stations equipped with quantum non-demolition detectors and quantum memories. We show that this approach allows entanglement creation at viable rates over distances that are inaccessible via direct transmission through optical fibers or even from very distant satellites.