Using the Non-linear Schrödinger Equation, we have found a new mechanism for the generation of vortices in a superfluid. This mechanism could be relevant for explaining the experimental creation of vortices by vibrations. This follows from the break-up of dark solitons in more than 1 D, which are linearly unstable, as shown by Kusnetsov and Turitsyn, Ž. Eksp. Teor. Fiz. , 94 (1988) 119 ( Sov Phys. JETP , 67 (1988) 1583).
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Josserand et al. (1995) studied this question.
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