Stability of superflow
- 1 May 1994
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 49 (17) , 12087-12094
- https://doi.org/10.1103/physrevb.49.12087
Abstract
The stability of uncharged superflow is studied within the Ginzburg-Landau theory. The linear-stability problem for flow in the presence of a flat wall is solved analytically. We prove that the critical velocity is not modified from its value for homogeneous superflow if the order parameter is required to vanish at the wall. We further show that surface roughness on the scale of the coherence length does have a strong effect on the stability of the flow. The critical velocity in the vicinity of a two-dimensional surface ‘‘bump’’ is well described by a power law for the parameter values considered.Keywords
This publication has 15 references indexed in Scilit:
- Quantum nucleation of vortices in the flow of superfluidthrough an orificePhysical Review Letters, 1992
- Evidence for quantum tunneling of phase-slip vortices in superfluidPhysical Review Letters, 1992
- Order-parameter textures and boundary conditions in rotating vortex-freePhysical Review Letters, 1990
- Coupling of zero sound to the real squashing mode in rotatingPhysical Review Letters, 1989
- Vortex-free state ofHe-B in a rotating cylinderPhysical Review Letters, 1987
- Persistent currents in superfluid3HeJournal of Low Temperature Physics, 1985
- The nucleation of vorticity by ions in superfluid 4 He I. Basic theoryPhilosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1984
- Roton Emission from Negative Ions in Helium IIPhysical Review Letters, 1966
- Considerations on the Flow of Superfluid HeliumReviews of Modern Physics, 1966
- Quantized Vortex Rings in Superfluid HeliumPhysical Review B, 1964