Enhanced oscillation lifetime of a Bose–Einstein condensate in the 3D/1D crossover. (24th September 2015)

• Record Type: Journal Article
• Authors: Yuen, B; Barr, I J M; Cotter, J P; Butler, E; Hinds, E A
• Is Part Of: New journal of physics. Volume 17:Number 9(2015:Sep.)
• Publication Date: 2015-09-24
• Subjects: low-dimensional quantum gasses -- Bose–Einstein condensate -- dissipation -- atom chips -- cold atoms; 67.85.-d -- 03.75.Kk -- 47.37.+q -- 47.60.-i; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/17/9/093041
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: 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.