Silicon photonic integrated circuit developed by ORNL scientists combines a bidirectionally pumped microring resonator with polarization splitter-rotators to generate broadband, high-fidelity polarization-entangled photons across 116 frequency-bin pairs compatible with existing fiber-optic networks, marking a significant advancement toward a scalable quantum internet.
A quantum internet protocol using minimum cost aggregation and network concatenation enables efficient distribution of entangled bits with bounded error between arbitrary clients across multiple quantum networks regardless of distance, overcoming previous limitations and forming the necessary foundation for global-scale quantum networking.
Recent experimental breakthroughs in satellite quantum communications have opened up the possibility of creating a global Quantum Internet using satellite links.