Precision Measurements of Atom-Dimer Interactions in a Uniform Planar Bose Gas Article Swipe

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Dimer Degenerate energy levels Bound state Atom (system on chip) Atomic physics Physics Hyperfine structure Ground state Planar Line (geometry) Ultracold atom Microwave Quantum Chemistry Molecular physics Quantum mechanics Nuclear magnetic resonance Mathematics Embedded system Geometry Computer science Computer graphics (images)

C. Maury , B. Bakkali-Hassani , G. Chauveau , F. Rabec , S. Nascimbene , J. Dalibard , J. Beugnon ·

YOU? · · 2022 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2211.05049 · OA: W4308760089

Cold quantum gases, when acted upon by electromagnetic fields, can give rise to samples where isolated atoms coexist with dimers or trimers, which raises the question of the interactions between these various constituents. Here we perform microwave photoassociation in a degenerate gas of $^{87}$Rb atoms to create weakly-bound dimers in their electronic ground state. From the density-induced shift of the photoassociation line, we measure the atom-dimer scattering length for the two least-bound states of the molecular potential. We also determine the complete energy diagram of one hyperfine manifold of the least-bound state, which we accurately reproduce with a simple model.