Quantum entanglement lasts 600 times longer in elusive dark states, study finds

Scientists have created quantum entanglement in dark states, which were previously only theoretical. This breakthrough enables entanglement to last 36 nanoseconds—600 times longer than conventional bright states—because dark states resist external disturbances by remaining nearly invisible to light. The UNIST research team's achievement opens new possibilities for quantum memory, ultra-sensitive sensors, and energy-harvesting technologies.