Researchers have discovered quantum coherence in classical light fields, breaking conventional physics boundaries. By isolating subsystems from thermal light fields, which were previously deemed purely classical, they found surprising quantum interference patterns. This work shifts the understanding of the relationship between classical and quantum physics, showing that even classical systems can exhibit hidden quantum dynamics.
Utilizing advanced techniques like photon-number-resolving detection and orbital angular momentum measurements, the team transformed a classical pseudothermal light field into isolated multiphoton subsystems. They identified two behaviors: the majority followed classical optics, while a smaller subset displayed quantum phenomena akin to those seen in entangled photon systems.
Lead author Prof. Chenglong You emphasized the implications of these findings, suggesting they could enhance the creation of robust quantum technologies. The ability to derive quantum behaviors from classical sources presents new avenues for advancements in quantum imaging, sensors, and more. This research paves the way for scalable quantum technology development and broad applications in condensed matter physics and quantum information science. The study was conducted by a team from Louisiana State University and Universidad Nacional Autónoma de México, with support from various U.S. government agencies.
