Scientists have developed "quantum ping-pong": Using a special lens, two atoms can be made to bounce a single photon back and forth with high precision. Atoms can absorb and reemit light this is an everyday phenomenon. In most cases, however, an atom emits a light particle in all possible direc
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These are very special diamonds that are being worked with at TU Wien: Their crystal lattice is not perfectly regular, it contains numerous defects. In places where there would be two neighboring .