An electrically powered source of entangled light on a chip

Researchers have developed the first electrically powered, chip-integrated source of entangled light, marking a major leap for scalable quantum technologies. The breakthrough eliminates bulky laser setups, enabling compact, energy-efficient quantum devices. The innovation leverages semiconductor materials to generate entangled photon pairs via electrical injection, replacing traditional optical pumping methods. This simplifies system design while maintaining high entanglement fidelity, critical for quantum communication and computing. Published in January 2026, the work addresses a long-standing challenge in miniaturizing quantum light sources. Prior solutions relied on external lasers, limiting practical deployment in real-world quantum networks and portable devices. The chip-scale design integrates seamlessly with existing semiconductor fabrication processes, accelerating commercialization. Potential applications include ultra-secure quantum encryption, high-precision sensing, and fault-tolerant quantum processors. This advancement reduces power consumption by 90% compared to laser-based systems, paving the way for battery-operated quantum devices. The team aims to prototype full quantum networks using this technology within two years.