Ultracold charged atom-dimer collisions: state-selective charge exchange and three-body recombination
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2024
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| author | Pandey, Amrendra Vexiau, Romain Marcassa, Luis Gustavo Dulieu, Olivier Bouloufa-Maafa, Nadia |
| author_facet | Pandey, Amrendra Vexiau, Romain Marcassa, Luis Gustavo Dulieu, Olivier Bouloufa-Maafa, Nadia |
| contents | Based on an accurate determination of the potential energy surfaces of Rb$_3^+$ correlated to its first asymptotic limit Rb$^+$$+$Rb($5s$)$+$Rb($5s$), we identify the presence of intersections of a pair of singlet and triplet surfaces over all interparticle distances, leading to Jahn-Teller couplings. We elaborate scenarios for charge exchange between ultracold charged atom-dimer complex (Rb$+$Rb$_2^+$ or Rb$^+$$+$Rb$_2$), predicting a strong selectivity on the preparation of the initial state of the dimer. We also demonstrate that the JT couplings must drive the three-body recombination (TBR) of Rb$^+$, Rb, and Rb at ultracold energies. Using the current analysis, we provide a consistent picture of the TBR experiments performed in ion-atom hybrid Rb samples \cite{dieterle2020inelastic,harter2012single}. We also demonstrate the presence of JT coupling as a general phenomenon in the singly-charged homonuclear alkali triatomic systems. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_14824 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Ultracold charged atom-dimer collisions: state-selective charge exchange and three-body recombination Pandey, Amrendra Vexiau, Romain Marcassa, Luis Gustavo Dulieu, Olivier Bouloufa-Maafa, Nadia Atomic Physics Based on an accurate determination of the potential energy surfaces of Rb$_3^+$ correlated to its first asymptotic limit Rb$^+$$+$Rb($5s$)$+$Rb($5s$), we identify the presence of intersections of a pair of singlet and triplet surfaces over all interparticle distances, leading to Jahn-Teller couplings. We elaborate scenarios for charge exchange between ultracold charged atom-dimer complex (Rb$+$Rb$_2^+$ or Rb$^+$$+$Rb$_2$), predicting a strong selectivity on the preparation of the initial state of the dimer. We also demonstrate that the JT couplings must drive the three-body recombination (TBR) of Rb$^+$, Rb, and Rb at ultracold energies. Using the current analysis, we provide a consistent picture of the TBR experiments performed in ion-atom hybrid Rb samples \cite{dieterle2020inelastic,harter2012single}. We also demonstrate the presence of JT coupling as a general phenomenon in the singly-charged homonuclear alkali triatomic systems. |
| title | Ultracold charged atom-dimer collisions: state-selective charge exchange and three-body recombination |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2407.14824 |