With the aid of terahertz radiation, Munich physicists have developed a method for generating and controlling ultrashort electron pulses. With further improvements, this technique should be capable of capturing even electrons in motion.
In a proof-of-principle experiment, researchers have demonstrated that a small group of individual atoms placed very precisely in silicon can act as a quantum simulator, mimicking nature - in this case, the weird quantum interactions of electrons in materials.
Light propagating in a layer of scattering nanoparticles, shows the principle of diffusion. The deeper light is penetrating into the layer, the lower the energy density. Scientists managed to turn this falling diffusion curve into a rising one, by manipulating the incident light.
The microscopic world is governed by the rules of quantum mechanics, where the properties of a particle can be completely undetermined and yet strongly correlated with those of other particles. Physicists have observed these so-called Bell correlations for the first time between hundreds of atoms.
Phone calls and text messages reach you wherever you are because your phone has a unique identifying number that sets you apart from everybody else on the network. Researchers are using a similar principle to track cells being sorted on microfluidic chips.