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Rogue waves in superfluid helium.

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<mark>Journal publication date</mark>2010
<mark>Journal</mark>European Physical Journal - Special Topics
Issue number1
Number of pages13
Pages (from-to)181-193
<mark>Original language</mark>English


Rogue waves have been observed in superfluid helium. The experimental system consists of high intensity second sound (temperature-entropy) waves within a resonant cavity. Under steady state conditions, with a constant oscillatory driving force at the resonant frequency, the waves are turbulent and there are fluxes of energy towards both high and low frequencies. Rogue waves appear under the nonequilibrium conditions that prevail shortly after the drive has been switched on, prior to establishment of the steady state. The experiment is described briefly, relevant results are presented and discussed theoretically in terms of nonlinear wave interactions, and possible connections to rogue waves on the ocean are considered.