Vortices and sound waves in superfluids

Details Vortices and sound waves in superfluids Vortices and sound waves in superfluids

1994-09-12

arxiv.org/abs/cond-mat/9409046v1

Physics

Condensed Matter

10 pages, phyzzx macro, CU-TP-652 and NI-94-013

Scientific paper

We consider the dynamics of vortex strings and sound waves in superfluids in the phenomenological Landau-Ginzburg equation. We first derive the vortex equation where the velocity of a vortex is determined by the average fluid velocity and the density gradient near the vortex. We then derive the effective action for vortex strings and sound waves by the dual formulation. The effective action might be useful in calculating the emission rate of sound waves by moving vortex strings.

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