TY - JOUR
T1 - Vortex dynamics in a model of superflow
T2 - The role of acoustic excitations
AU - Abraham, Michael
AU - Aranson, Igor
AU - Galanti, Barak
PY - 1995
Y1 - 1995
N2 - In this paper we present numerical simulations for the dynamics of a vortex pair described by the two-dimensional nonlinear Schrödinger equation. The simulations reveal significant nonvanishing fluctuations around the classical velocities of vortices in an ideal incompressible fluid due to excitation of the acoustic (or sound) field. The reason for the fluctuations is the potentiality of the superflow, which introduces significant compressibility to the superfluid. We discuss some implications of this observation, especially on existing discrepancies between theories of superfluid turbulence. We indicate a possible mechanism for the spontaneous nucleation of a small vortex ring in the three-dimensional nonlinear Schrödinger equation.
AB - In this paper we present numerical simulations for the dynamics of a vortex pair described by the two-dimensional nonlinear Schrödinger equation. The simulations reveal significant nonvanishing fluctuations around the classical velocities of vortices in an ideal incompressible fluid due to excitation of the acoustic (or sound) field. The reason for the fluctuations is the potentiality of the superflow, which introduces significant compressibility to the superfluid. We discuss some implications of this observation, especially on existing discrepancies between theories of superfluid turbulence. We indicate a possible mechanism for the spontaneous nucleation of a small vortex ring in the three-dimensional nonlinear Schrödinger equation.
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U2 - 10.1103/PhysRevB.52.R7018
DO - 10.1103/PhysRevB.52.R7018
M3 - Article
AN - SCOPUS:0009957590
VL - 52
SP - R7018-R7021
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 2469-9950
IS - 10
ER -