Vortex interactions in the collision of Bose–Einstein condensates

Tao Yang, Andrew Henning, Keith Benedict

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We investigate the effects of vortex interaction on the formation of interference patterns in a coherent pair of two-dimensional Bose condensed clouds of ultra-cold atoms traveling in opposite directions subject to a harmonic trapping potential. We identify linear and nonlinear regimes in the dipole oscillations of the condensates according to the balance of internal and centre-of-mass energies of the clouds. Simulations of the collision of two clouds each containing a vortex with different winding number (charge) are carried out in these regimes in order to investigate the creation of varying interference patterns. The interaction between different vortex types can be clearly distinguished by those patterns.
LanguageEnglish
Article number115502
JournalLaser Physics
Volume24
Issue number11
DOIs
Publication statusPublished - 10 Sep 2014
Externally publishedYes

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Bose-Einstein condensates
Vortex flow
vortices
collisions
interference
interactions
center of mass
condensates
trapping
dipoles
harmonics
Atoms
oscillations
atoms
simulation
energy

Cite this

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Vortex interactions in the collision of Bose–Einstein condensates. / Yang, Tao; Henning, Andrew; Benedict, Keith .

In: Laser Physics, Vol. 24, No. 11, 115502, 10.09.2014.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Henning, Andrew

AU - Benedict, Keith

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N2 - We investigate the effects of vortex interaction on the formation of interference patterns in a coherent pair of two-dimensional Bose condensed clouds of ultra-cold atoms traveling in opposite directions subject to a harmonic trapping potential. We identify linear and nonlinear regimes in the dipole oscillations of the condensates according to the balance of internal and centre-of-mass energies of the clouds. Simulations of the collision of two clouds each containing a vortex with different winding number (charge) are carried out in these regimes in order to investigate the creation of varying interference patterns. The interaction between different vortex types can be clearly distinguished by those patterns.

AB - We investigate the effects of vortex interaction on the formation of interference patterns in a coherent pair of two-dimensional Bose condensed clouds of ultra-cold atoms traveling in opposite directions subject to a harmonic trapping potential. We identify linear and nonlinear regimes in the dipole oscillations of the condensates according to the balance of internal and centre-of-mass energies of the clouds. Simulations of the collision of two clouds each containing a vortex with different winding number (charge) are carried out in these regimes in order to investigate the creation of varying interference patterns. The interaction between different vortex types can be clearly distinguished by those patterns.

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