Researchers at the University of Ottawa and the Max Planck Institute for the Science of Light have successfully generated quantum-entangled photons directly from sunlight, matching the performance of traditional lasers after accounting for bandwidth differences. Published in Optica, this proof-of-concept demonstrates that abundant natural light can power quantum technologies, offering a pathway toward energy-efficient quantum computing and satellite-based secure communications.

A proof-of-principle experiment used concentrated sunlight to produce entangled photons

Researchers at the University of Ottawa and the Max Planck Institute for the Science of Light have successfully generated quantum-entangled photons directly from sunlight,…