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Observation of an Inverse Energy Cascade in Developed Acoustic Turbulence in Superfluid Helium.

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>8/08/2008
<mark>Journal</mark>Physical Review Letters
Number of pages4
<mark>Original language</mark>English


We report observation of an inverse energy cascade in second sound acoustic turbulence in He II. Its onset occurs above a critical driving energy and it is accompanied by giant waves that constitute an acoustic analogue of the rogue waves that occasionally appear on the surface of the ocean. The theory of the phenomenon is developed and shown to be in good agreement with the experiments.