An experimental platform for studying the heteronuclear Efimov effect with an ultracold mixture of $^6$Li and $^{133}$Cs atoms

Eleonora Lippi; Manuel Gerken; Stephan Häfner; Marc Repp; Rico Pires; Michael Rautenberg; Tobias Krom; Eva D. Kuhnle; Binh Tran; Juris Ulmanis; Bing Zhu; Lauriane Chomaz; Matthias Weidemüller

doi:10.1007/s00601-024-01971-9

arXiv · 2410.16031

An experimental platform for studying the heteronuclear Efimov effect with an ultracold mixture of $^6$Li and $^{133}$Cs atoms

Eleonora Lippi·Manuel Gerken·Stephan Häfner·Marc Repp·Rico Pires·Michael Rautenberg·Tobias Krom·Eva D. Kuhnle·Binh Tran·Juris Ulmanis·Bing Zhu·Lauriane Chomaz·Matthias Weidemüller

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Abstract

We present the experimental apparatus enabling the observation of the heteronuclear Efimov effect in an optically trapped ultracold mixture of $^6$Li-$^{133}$Cs with high-resolution control of the interactions. A compact double-species Zeeman slower consisting of four interleaving helical coils allows for a fast-switching between two optimized configurations for either Li or Cs and provides an efficient sequential loading into their respective MOTs. By means of a bichromatic optical trapping scheme based on species-selective trapping we prepare mixtures down to 100 nK of 1$\times$ 10$^4$ Cs atoms and 7$\times$ 10$^3$ Li atoms. Highly stable magnetic fields allow high-resolution atom-loss spectroscopy and enable to resolve splitting in the loss feature of a few tens of milligauss. These features allowed for a detailed study of the Efimov effect.

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Eleonora Lippi, Manuel Gerken, Stephan Häfner, Marc Repp, Rico Pires, Michael Rautenberg, Tobias Krom, Eva D. Kuhnle, Binh Tran, Juris Ulmanis, Bing Zhu, Lauriane Chomaz, Matthias Weidemüller. 2024-10-21. An experimental platform for studying the heteronuclear Efimov effect with an ultracold mixture of $^6$Li and $^{133}$Cs atoms. https://doi.org/10.1007/s00601-024-01971-9

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