Atomchip zum Kühlen und Manipulieren der ultrakalten Atomwolken.
[ Florian Aigner - A theoretical trick allows scientists to describe quantum states of thousands of atoms. If standard methods were used, all storage capacity in the world would not be enough to do this. For a long time, quantum experiments were only carried out with a small number of particles. Even the behaviour of single atoms or molecules can be very hard to describe. Today, it has become possible to control several thousand atoms in an experiment, but for theoretical calculations this entails serious problems. The quantum state of such a large system is so complicated that all matter on earth would not be enough to store it in a classical way. In the journal 'Nature Communications', scientists from the TU Wien (Vienna) and the Free University of Berlin now present a quantum tomography method, which makes it possible to measure and describe the state of a large quantum system very precisely with just a few measurements.
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