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Evidence for the superradiant behaviour of quantum dots — behaviour first described in the context of atoms in a gas over 50 years ago — suggests they can radiatively interact over distances of at least 150 nm.
Spacetime might seem smooth, but it could, at very short length scales, be quantized. Energetic neutrinos from gamma-ray bursts could provide a useful means to investigate further, and probe the nature of quantum gravity.
Ideas of high-energy particle physics have been borrowed for a device that might bring insight into fundamental questions of chemical physics — the molecular synchrotron. A whole number of applications may benefit.
Physicists have long debated whether the 'hidden order' in URu2Si2 is itinerant or localized, and it remains inaccessible to direct external probes. The observation of an overdamped collective mode seems to resolve this outstanding issue.
The first, long-sought evidence for the production of single top quarks, by the weak interaction, has been reported from a sophisticated analysis of a large number of proton–antiproton collisions at the Tevatron.