Light and matter united
Lene Hau, Mallinckrodt Professor of Physics and of Applied Physics, has several times shaken scientists' beliefs about the nature of light and matter. Now she and her team have done it again, making a light pulse disappear from one cold cloud then retrieved it from another cloud nearby. In the process, light was converted into matter then back into light. For the first time in history, this gives science a way to control light with matter and vice versa. Staff photo Justin Ide/Harvard News Office Full story
