Researchers from the University of Birmingham have succeeded in establishing, for the first time, the exact representation of a photon, this particle of light. The discovery, made possible by a new theory, promises spectacular advances in future technologies.
Photons are formed when atoms or molecules emit energy, but their behavior is strongly influenced by their environment. Precisely understanding these interactions has been a puzzle for physicists for decades. Until today. A team found a way to organize these interactions into distinct categories, allowing them to be better analyzed.
Credit: Dr. Benjamin Yuen
By combining this approach with quantum calculations, the researchers created a model that explains not only how a photon interacts with its immediate environment, but also how it diffuses its energy into more distant spaces. This model allowed them, almost by chance, to visualize the shape of a photon, an image never before seen in thehistory of physics. Dr Benjamin Yuen, responsible for this work published in Physical Review Lettersexplains that this visualization results from a problem initially considered too complex to solve. Using their method, the researchers found a way to simplify this problem and make it computable. The result exceeds all expectations.
Why is this important? Because by better understanding how photons interact with matter and their environment, scientists will be able to design even more efficient technologies. This research could lead to tamper-proof communication systems, sensors capable of detecting pathogens or even tools for controlling chemical reactions on a microscopic scale.
Professor Angela Demetriadou, co-author of the study, adds that the shape and color of a photon directly depend on the properties of its environment. These details, once considered unnecessary noise, are now revealed to be rich in information.
These advances also mark a key step in mastering the interactions between light and matter. Understanding these mechanisms could improve technologies like solar panels or quantum computers. This news theoryby giving a clear image of photons, opens perspectives for science and future innovations.
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