After previously studying the phenomena of two sound waves in quantum liquids, scientists have now observed sound moving at two different speeds in a quantum gas.
in quantum liquids, scientists have now observed sound moving at two different speeds in a quantum gas.
"These observations demonstrate all the key features of the two-fluid theory for a highly compressible gas," write the researchers in theirWe would say do not try this at home, but we doubt you would be able to: in this experiment, the scientists cooled a gas of potassium atoms down to less than a millionth of a degree above absolute zero, trapping the atoms in a vacuum chamber., where there is so little energy that the atoms are barely moving or interacting.
Liquids and gases become quantum when they start exhibiting quantum mechanical properties – they start obeying a different set of laws compared with those that govern the classical physics of the Universe. All of which feeds into our knowledge of quantum hydrodynamics, essentially the study of liquids in this quantum state.The quantum realm is a difficult one to get your head around, and insights like this will be useful for future research and observations.
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