Adaptive reflection and focusing of Bose-Einstein condensates
A. S. Arnold, C. MacCormick, and M. G. Boshier
TL;DR
This paper demonstrates adjustable magnetic bouncing and focusing of a Bose-Einstein condensate using a simple apparatus, with potential applications in matter-wave atom-optics and observed diffraction effects.
Contribution
It introduces a straightforward method for magnetic bouncing and focusing of BECs, extending theoretical models and highlighting the potential for matter-wave diffraction.
Findings
Strong focusing inferred from experiments
Good agreement with extended theoretical models
Potential for observing atomic matter-wave diffraction
Abstract
We report adjustable magnetic `bouncing' and focusing of a dilute Rb Bose gas. Both the condensate production and manipulation are realised using a particularly straight-forward apparatus. The bouncing region is comprised of approximately concentric ellipsoidal magnetic equipotentials with a centre that can be adjusted vertically. We extend, and discuss the limitations of, simple Thomas-Fermi and Monte-Carlo theoretical models for the bouncing, which at present find close agreement with the condensate's evolution. Very strong focusing has been inferred and the observation of atomic matter-wave diffraction should be possible. Prospects look bright for applications in matter-wave atom-optics, due to the very smooth nature of the mirror.
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