Dynamically Slowed Collapse of a Bose-Einstein Condensate with Negative Scattering Length

Abstract

We rapidly change the scattering length a_s of a 87Rb Bose-Einstein condensate by means of a Feshbach resonance, simultaneously releasing the condensate from its harmonic trapping potential. When a_s is changed from positive to negative, the subsequent collapse of the condensate is stabilized by the kinetic energy imparted during the release, resulting in a deceleration of the loss rate near the resonance. We also observe an increase in the Thomas-Fermi radius, near the resonance, that cannot be understood in terms of a simple scaling model. Instead, we describe this behavior using the Gross-Pitaevskii equation, including three-body recombination, and hypothesize that the increase in cloud radius is due to the formation of concentric shells.

5 pages, 4 figures; Updated to published version

References in corpus (15)

• Dynamics of collapsing and exploding Bose-Einstein condensates
• Controlled Collapse of a Bose-Einstein Condensate
• Strongly enhanced inelastic collisions in a Bose-Einstein condensate near Feshbach resonances
• Feshbach resonances in rubidium 87: Precision measurement and analysis
• Three-body recombination of ultra-cold atoms to a weakly bound $s$ level
• Three-body recombination at large scattering lengths in an ultracold atomic gas
• Direct observation of growth and collapse of a Bose-Einstein condensate with attractive interactions
• Three-body decay of a rubidium Bose-Einstein condensate
• Rapid production of ${}^{87}$Rb BECs in a combined magnetic and optical potential
• Phase Sensitive Recombination of Two Bose-Einstein Condensates on an Atom Chip
• Characterization of elastic scattering near a Feshbach resonance in rubidium 87
• Bose-Einstein condensate collapse: a comparison between theory and experiment
• Explosion of a collapsing Bose-Einstein condensate
• Bosenova and three-body loss in a Rb-85 Bose-Einstein condensate
• Collisional relaxation of Feshbach molecules and three-body recombination in 87Rb Bose-Einstein condensates

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• Dispersion engineering in spin-orbit coupled spinor $F=1$ condensates driven by negative masses
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