To those unfamiliar with quantum mechanics, the achievement might seem minor. Yet in the world of quantum research, this moment is transformative. With the ability to create quantum entanglement between two light sources, a host of commercial technologies could soon become reality.

Control over multiple quantum light sources forms the bedrock of quantum networks. Entanglement —where two light sources are linked, no matter the distance—remains a pillar of quantum physics. Without it, building fast quantum computers and developing next-generation encryption would stay out of reach.

The findings, recently published in Science, spotlight just how far the field has come. Researchers at the Niels Bohr Institute underscored the breakthrough’s major impact on the future of quantum technologies.