Direct Measurements of Collisional Dynamics in Cold Atom Triads

Abstract

The introduction of optical tweezers for trapping atoms has opened remarkable opportunities for manipulating few-body systems. Here, we present the first bottom-up assembly of atom triads. We directly observe atom loss through inelastic collisions at the single event level, overcoming the substantial challenge in many-atom experiments of distinguishing one-, two-, and three-particle processes. We measure a strong suppression of three-body loss, which is not fully explained by the presently availably theory for three-body processes. The suppression of losses could indicate the presence of local anti-correlations due to the interplay of attractive short range interactions and low dimensional confinement. Our methodology opens a promising pathway in experimental few-body dynamics.

11 pages, 4 figures, includes Supplemental Material

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• Strong spin-exchange recombination of three weakly interacting ${}^7$Li atoms
• Signatures of the BCS-BEC crossover in the yrast spectra of Fermi quantum rings
• Individual assembly of two-species Rydberg molecules using optical tweezers
• Universality of excited three-body bound states in one dimension
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• Feshbach Spectroscopy of Cs Atom Pairs in Optical Tweezers
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• Three-body contact for fermions. I. General relations
• Probing the interaction energy of two ${}^{85}$Rb atoms in an optical tweezer via spin-motion coupling
• Tunnel-coupled optical microtraps for ultracold atoms
• Isotope study of the nonlinear pressure shifts of ${}^{85}$Rb and ${}^{87}$Rb hyperfine resonances in Ar, Kr, and Xe buffer gases
• Emergence of N-body tunable interactions in universal few-atom system
• Lellouch-Lüscher relation for ultracold few-atom systems under confinement
• Efimov energy level rebounding off the atom-dimer continuum