Not every­thing is where it seems to be
(World News Austria)

Image: The spiral wavefront of the elliptically polarized light hits the lens at a slight angle, leading to the impression that the source of the light is somewhat off its actual position. (Credit: IQOQI Innsbruck/Harald Ritsch) With modern optical imaging techniques, the position of objects can be measured with a precision that reaches a few nanometers. These techniques are used in the laboratory, for example, to determine the position of atoms in quantum experiments. `We want to know the position of our quantum bits very precisely so that we can manipulate and...