Hidden quantum behaviors within classical light, which could make quantum technologies robust

https://www.eurekalert.org/news-releases/1069040

"boundary between classical/ quantum physics... projected fragmented classical pseudothermal light fields into smaller isolated multiphoton subsystems, uncovering quantum coherence such as particle interference previously thought unique to quantum systems... most exhibited classical coherence, smaller subset exhibited quantum coherence: interference similar to entanglement... isolate quantum systems classical system hidden in quantum dynamics... room temperature quantum imaging/ sensors "