Suppression of Kelvon-induced decay of quantized vortices in oblate Bose-Einstein condensates

S. J. Rooney, P. B. Blakie, Brian P Anderson, A. S. Bradley

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

We study the Kelvin mode excitations on a vortex line in a three-dimensional trapped Bose-Einstein condensate at finite temperature. Our stochastic Gross-Pitaevskii simulations show that the activation of these modes can be suppressed by tightening the confinement along the direction of the vortex line, leading to a strong suppression in the vortex decay rate as the system enters a regime of two-dimensional vortex dynamics. As the system approaches the condensation transition temperature, we find that the vortex decay rate is strongly sensitive to dimensionality and temperature, observing a large enhancement for quasi-two-dimensional traps. Three-dimensional simulations of the recent vortex dipole decay experiment of Neely confirm two-dimensional vortex dynamics and predict a dipole lifetime consistent with experimental observations and suppression of Kelvon-induced vortex decay in highly oblate condensates.

Original languageEnglish (US)
Article number023637
JournalPhysical Review A
Volume84
Issue number2
DOIs
StatePublished - Aug 29 2011

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Bose-Einstein condensates
retarding
vortices
decay
decay rates
dipoles
condensates
simulation
condensation
transition temperature
traps
activation
life (durability)
temperature
augmentation
excitation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Suppression of Kelvon-induced decay of quantized vortices in oblate Bose-Einstein condensates. / Rooney, S. J.; Blakie, P. B.; Anderson, Brian P; Bradley, A. S.

In: Physical Review A, Vol. 84, No. 2, 023637, 29.08.2011.

Research output: Contribution to journalArticle

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