2017/08/29 by Jun Rui, Huan Yang, Lan Liu +5 · 8 citations
Chemistry · Computer Science · Physics and Astronomy · #Atom (system on chip) #Atomic physics #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Collision #Endothermic process #Physical chemistry #Physics #Quantum #Quantum Information and Cryptography #Quantum mechanics #Strong Light-Matter Interactions #cond-mat.quant-gas #physics.chem-ph
paper · pdf · doi:10.1103/physreva.100.032706
published in Physical Review A 100(3) (American Physical Society) · 5+5 pages, 4+6 figures
arxiv created 2017/08/29 · openalex created_date 2017/09/15 · openalex publication_date 2019/09/16 · arxiv updated 2019/09/25 · openalex updated_date 2026/08/05
We report on the investigation of endothermic and nearly thermoneutral atom-exchange collisions in an ultracold atom-dimer mixture. By developing an indirect preparation method based on a molecular bound-bound transition, we are able to directly observe an endothermic collision with a tunable energy threshold and study the state-to-state collision dynamics. The collision rate coefficients show a striking threshold phenomenon. The influence of the reverse process on the collision dynamics is observed for the endothermic and nearly thermoneutral collisions. We carry out zero-range quantum-mechanical scattering calculations to obtain the collision rate coefficients, and the three-body parameter is determined by comparison with the experiments. The observed endothermic and nearly thermoneutral collisions may be employed to implement quantum simulation of the Kondo effect with ultracold molecules.