Physicists at the CNRS and the Université Paris-Sud say they have observed the Hong-Ou-Mandel effect with atoms for the first time. This effect, first observed in an experiment nearly 30 years ago for photons, occurs when two individual but identical light particles enter the two arms of a “beam splitter” at the same time. The new observations with atoms instead of photons could be important for testing fundamental concepts in physics, such as Bell’s inequalities and the quantum-to-classical transition, and may even be of interest for quantum information processing in the future……
http://nanotechweb.org/cws/article/tech/60780