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arXiv · 2112.01782

Tunable three-body interactions in driven two-component Bose-Einstein condensates

A. Hammond·L. Lavoine·Thomas Bourdel
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Abstract

We propose and demonstrate the appearance of an effective attractive three-body interaction in coherently-driven two-component Bose Einstein condensates. It originates from the spinor degree of freedom that is affected by a two-body mean-field shift of the driven transition frequency. Importantly, its strength can be controlled with the Rabi-coupling strength and it does not come with additional losses. In the experiment, the three-body interactions are adjusted to play a predominant role in the equation of state of a cigar-shaped trapped condensate. This is confirmed though two striking observations: a downshift of the radial breathing mode frequency and the radial collapses for positive values of the dressed-state scattering length.

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A. Hammond, L. Lavoine, Thomas Bourdel. 2021-12-03. Tunable three-body interactions in driven two-component Bose-Einstein condensates. https://doi.org/10.1103/physrevlett.128.083401

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