Tunable Three-Body Interactions in Driven Two-Component Bose-Einstein Condensates

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, i...

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Published in:Physical review letters 2022-02, Vol.128 (8), p.083401-083401, Article 083401
Main Authors: Hammond, A, Lavoine, L, Bourdel, T
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Language:English
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Condensed Matter
Physics
Quantum Gases
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description 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 through 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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subjects Condensed Matter
Physics
Quantum Gases
title Tunable Three-Body Interactions in Driven Two-Component Bose-Einstein Condensates
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