Second sound is a quantum mechanical phenomenon, which has been observed
only in superfluid helium.
Physicists from the University of Innsbruck,
Austria, in collaboration with colleagues from the University of
Trento, Italy, have now proven the propagation of such a temperature
wave in a quantum gas.
The scientists have published their historic
findings in the journal Nature.
The cigar-shaped particle cloud is locally heated with a power-modulated laser beam (green). (Credit: IQOQI/Ritsch) |
Credit: http://www.alphagalileo.org
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