Sunlight now generates quantum entanglement in lab tests

The global information and communication technology sector already accounts for approximately 1.8% and 3.9% of worldwide greenhouse gas emissions and energy use, and a new study demonstrates a path toward lessening that impact through a surprising light source. Researchers have, for the first time, successfully generated quantum entanglement using sunlight, a development that bypasses the substantial energy demands of conventional quantum systems. Existing platforms requiring millikelvin-level cooling routinely consume 5-10 kilowatts of electrical power per unit, while this approach offers the potential for significantly more sustainable quantum technologies by utilizing a readily available resource. Harnessing sunlight to create quantum entanglement represents a significant departure from conventional methods reliant on electricity-intensive lasers. The work establishes that even the lack of optical coherence in sunlight does not preclude the generation of entangled photon…