2021/02/28 by Caiyun Zhao, Cai-Yun Zhao, Hui-Li Han +2
Chemistry · Physics and Astronomy · #Atomic physics #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Gene #Optics #Physics #Quantum optics and atomic interactions #Recombination #Resonance (particle physics) #Scattering #Strong Light-Matter Interactions #cond-mat.quant-gas #physics.atm-clus #physics.atom-ph
paper · pdf · doi:10.1103/physreva.104.013317
published as Phys. Rev. A 104, 013317 (2021)
openalex created_date 2021/03/01 · openalex publication_date 2021/07/29 · arxiv created 2021/07/30 · arxiv updated 2021/08/04 · openalex updated_date 2026/08/05
In this study, we investigate the three-body recombination (TBR) rates on both sides of the interspecies d-wave Feshbach resonance in the 85Rb -87Rb\ensuremath-87Rb system using the R-matrix propagation method in the hyperspherical coordinate frame. Our calculations are based on the Lennard-Jones model potential for the Rb-Rb interaction. Two different mechanisms of recombination-rate enhancement for positive and negative 85Rb -87Rb d-wave scattering lengths are analyzed. On the positive-scattering-length side, recombination-rate enhancement occurs due to the existence of three-body shape resonance, while on the negative-scattering-length side, the coupling between the lowest entrance channel and the highest recombination channel is crucial to the appearance of the enhancement. In addition, our study shows that the intraspecies interaction has a significant role in determining the emergence of recombination-rate enhancements. Compared to the case in which the three pairwise interactions are in d-wave resonance, when the 87Rb\ensuremath-87Rb interaction is near the d-wave resonance, the values of the interspecies scattering length that produce the recombination enhancement shift. In particular, when the 87Rb\ensuremath-87Rb interaction is away from the d-wave resonance, the enhancement disappears on the side with negative interspecies scattering length.