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Open Quantum Systems Decoherence Quantum Simulation

Instability and Vortex Rings Dynamics in a Three-Dimensional Superfluid Flow Through a Constriction

arXiv
Authors: F. Piazza, L. A. Collins, A. Smerzi

Year

2010

Paper ID

28888

Status

Preprint

Abstract Read

~2 min

Abstract Words

107

Citations

N/A

Abstract

We study the instability of a superfluid flow through a constriction in three spatial dimensions. We consider a Bose-Einstein condensate at zero temperature in two different geometries: a straight waveguide and a torus. The constriction consists of a broad, repulsive penetrable barrier. In the hydrodynamic regime, we find that the flow becomes unstable as soon as the velocity at the classical (Thomas-Fermi) surface equals the sound speed inside the constriction. At this critical point, vortex rings enter inside the bulk region of the cloud. The nucleation and dynamics scenario is strongly affected by the presence of asymmetries in the velocity and density of the background condensate flow.

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  • This paper contributes to the Quantum Simulation research area in the Quantum Articles archive.
  • It adds a 2010 reference point for readers tracking recent quantum research.
  • We study the instability of a superfluid flow through a constriction in three spatial dimensions.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1011.5041 [2] arXiv https://arxiv.org/abs/1011.5041 [3] Publisher https://arxiv.org/abs/1011.5041

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