Enhanced oscillation lifetime of a Bose-Einstein condensate in the 3D/1D crossover

We have measured the damped motion of a trapped Bose-Einstein condensate, oscillating with respect to a thermal cloud. The cigar-shaped trapping potential provides enough transverse confinement that the dynamics of the system are intermediate between three-dimensional and one-dimensional. We find th...

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Bibliographic Details
Published inNew journal of physics Vol. 17; no. 9; pp. 93041 - 93047
Main Authors Yuen, B, Barr, I J M, Cotter, J P, Butler, E, Hinds, E A
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 24.09.2015
Subjects
67.85.-d
atom chips
Bose-Einstein condensate
Bose-Einstein condensates
cold atoms
Confinement
Crossovers
Damping
dissipation
Dynamical systems
Dynamics
Excitation
Landau damping
low-dimensional quantum gasses
Physics
Three dimensional
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Summary:We have measured the damped motion of a trapped Bose-Einstein condensate, oscillating with respect to a thermal cloud. The cigar-shaped trapping potential provides enough transverse confinement that the dynamics of the system are intermediate between three-dimensional and one-dimensional. We find that the scaling of the damping rate with temperature is consistent with Landau theory, but that the damping rate for axial oscillations at a given temperature is consistently smaller than expected for a three-dimensional gas. We attribute this to the suppressed density of states for low-energy transverse excitations (essential excitations for axial Landau damping), which results from the quantization of the radial motion.
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ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/17/9/093041