Phys.org  January 19, 2023 More than 80 years after quantum recoil was proposed researchers in Singapore have demonstrated the phenomenon of quantum recoil showing that it is observable at room temperature. By scattering free electrons off the periodic two-dimensional atomic sheets of van der Waals materials in a tabletop platform, they showed that the X-ray photon energy is accurately predicted only by quantum recoil theory, that it can be enormous, to the point that a classically predicted X-ray photon is emitted as an extremely low-energy photon. According to the researchers quantum recoil is a means of precision control over outgoing […]