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Monopole core instability and Alice rings in spinor Bose-Einstein condensates

Monopole core instability and Alice rings in spinor Bose-Einstein condensates
Monopole core instability and Alice rings in spinor Bose-Einstein condensates
We show how the length scale hierarchy, resulting from different interaction strengths in an optically-trapped spin-1 Na-23 Bose-Einstein condensate, can lead to intriguing core deformations in singular topological defects. In particular, a point defect can be unstable with respect to the formation of a stable half-quantum vortex ring (an 'Alice ring'), providing a realistic scheme to use dissipation as a sophisticated state engineering tool. We compute the threshold for stability of the point monopole, which is beyond the current experimental regime.
bose-einstein condensation, radiation pressure, sodium, quantum optics
0031-9007
190402-[4pp]
Ruostekoski, J.
2beb155e-64b0-4ee9-9cfe-079947a9c9f4
Anglin, J.R.
8b1faf2d-d04e-43e6-be9e-e7d0da924367
Ruostekoski, J.
2beb155e-64b0-4ee9-9cfe-079947a9c9f4
Anglin, J.R.
8b1faf2d-d04e-43e6-be9e-e7d0da924367

Ruostekoski, J. and Anglin, J.R. (2003) Monopole core instability and Alice rings in spinor Bose-Einstein condensates. Physical Review Letters, 91 (19), 190402-[4pp]. (doi:10.1103/PhysRevLett.91.190402).

Record type: Article

Abstract

We show how the length scale hierarchy, resulting from different interaction strengths in an optically-trapped spin-1 Na-23 Bose-Einstein condensate, can lead to intriguing core deformations in singular topological defects. In particular, a point defect can be unstable with respect to the formation of a stable half-quantum vortex ring (an 'Alice ring'), providing a realistic scheme to use dissipation as a sophisticated state engineering tool. We compute the threshold for stability of the point monopole, which is beyond the current experimental regime.

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Published date: 2003
Keywords: bose-einstein condensation, radiation pressure, sodium, quantum optics

Identifiers

Local EPrints ID: 29355
URI: http://eprints.soton.ac.uk/id/eprint/29355
ISSN: 0031-9007
PURE UUID: c1ed9a65-28f8-44e3-b09e-45d1f15e0d26

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Date deposited: 12 May 2006
Last modified: 09 Nov 2021 07:44

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Contributors

Author: J. Ruostekoski
Author: J.R. Anglin

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