Bernhard Rauer in the lab at TU Wien. Credit: Image courtesy of Vienna University of Technology, TU Vienna
When cold milk is poured into a hot cup of tea, a temperature equilibrium is reached very quickly ie thermalization. It plays a crucial role in cooling down gases to ultra-low temperatures. But surprisingly, even gases for which this effect is suppressed can be cooled. Scientists at TU Wien took a closer look at this phenomenon and found a special quantum-mechanical kind of cooling at work.
“The particles that make up a liquid or a gas have different energies,” says Professor Jörg Schmiedmayer (TU Wien). The distribution of these energies depends on the temperature. The hotter the gas, the higher the number of particles with high energies...
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