Observation of Breathers in an Attractive Bose Gas

Abstract

In weakly nonlinear dispersive systems, solitons are spatially localized solutions which propagate without changing shape through a delicate balance between dispersion and self-focusing nonlinear effects. These states have been extensively studied in Bose-Einstein condensates, where interatomic interactions give rise to such nonlinearities. Previous experimental work with matter wave solitons has been limited to static intensity profiles. The creation of matter wave breathers--dispersionless soliton-like states with collective oscillation frequencies driven by attractive mean-field interactions--have been of theoretical interest due to the exotic behaviour of interacting matter wave systems. Here, using an attractively interacting Bose-Einstein condensate, we present the first observation of matter wave breathers. A comparison between experimental data and a cubic-quintic Gross-Pitaevskii equation suggests that previously unobserved three-body interactions may play an important role in this system. The observation of long lived stable breathers in an attractively interacting matter wave system indicates that there is a wide range of previously unobserved, but theoretically predicted, effects that are now experimentally accessible.

References in corpus (5)

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• Bogoliubov modes of a dipolar condensate in a cylindrical trap
• Polaritons are Not Weakly Interacting: Direct Measurement of the Polariton-Polariton Interaction Strength
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Cited by in corpus (4)

• Progress towards quantum-enhanced interferometry with harmonically trapped quantum matter-wave bright solitons
• Superballistic center-of-mass motion in one-dimensional attractive Bose gases: Decoherence-induced Gaussian random walks in velocity space
• Temperatures are not useful to characterise bright-soliton experiments for ultra-cold atoms
• Soliton-like behaviour in non-integrable systems