Long-lived remote ion-ion entanglement for scalable quantum repeaters

Key Points

• The entanglement achieved between ions is long-lived, enabling quantum information transfer over longer distances.
• Experiments highlight the ability to maintain coherence in entangled states, with implications for quantum networking protocols.
• Assessment using quantum optics methods shows the robustness of ion-ion entanglement under various conditions.
• These findings may enable significant improvements in quantum communication systems, paving the way for scalable quantum networks.