Stationary Vortices and Pair Currents in a Trapped Fermion Superfluid

We examine the effects of stationary vortices in superfluid 6 Li atoms at zero temperature in the frame of the recently developed fluiddynamical scheme, that includes the pair density and its associated pair current and pair kinetic energy in addition to the fields appearing in the hydrodynamical de...

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Bibliographic Details
Published in:Journal of low temperature physics 2015-05, Vol.179 (3-4), p.142-157
Main Authors: Capuzzi, P., Hernández, E. S., Szybisz, L.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Condensed Matter Physics
Density
Fluid dynamics
Fluid flow
Fluids
Frames
Kinetic energy
Magnetic Materials
Magnetism
Physics
Physics and Astronomy
Superfluidity
Vortices
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Summary:We examine the effects of stationary vortices in superfluid 6 Li atoms at zero temperature in the frame of the recently developed fluiddynamical scheme, that includes the pair density and its associated pair current and pair kinetic energy in addition to the fields appearing in the hydrodynamical description of normal fluids. In this frame, the presence of any particle velocity field gives rise to the appearance of a pair current. As an illustration, we consider a stationary vortex with cylindrical geometry in an unpolarized fluid, and examine the effects of the rotational velocity field on the spatial structure of the equilibrium gap and the profiles of the pair current. We show that the latter is intrinsically complex and its imaginary part is the source of a radial drift for the velocity field. We discuss the consequences on the stationary regime.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-014-1271-9