Speaker
Description
We present a theoretical study of weakly bound quantum systems in ultracold Bose-Fermi mixtures, focusing on their halo character and universal scaling behavior [1,2]. Using Variational Monte Carlo (VMC) and Diffusion Monte Carlo (DMC) methods, we compute ground-state binding energies and spatial distributions of few-body states formed near a Feshbach resonance in the $^{23}$Na–$^{23}$Na–$^{40}$K system [1]. We develop and analyze interaction models to observe how repulsive intraspecies interactions make a system dilute. We explore universal properties to compare our findings with established universality curves from molecular halo clusters and discuss the implications for heteronuclear mixtures.
[1] P. Stipanović, L. Vranješ Markić, I. Bešlić & J. Boronat: Universality in molecular halo clusters, Physical review letters, 113, 25 (2014).
[2] P. Stipanović, L. Vranješ Markić & J. Boronat: Van der Waals five-body size-energy universality, Scientific reports, 12, 10368 (2022).
[3] Alexander Y. Chuang, Huan Q. Bui, Arthur Christianen, Yiming Zhang, Yiqi Ni, Denise Ahmed-Braun, Carsten Robens & Martin W. Zwierlein: Observation of a Halo Trimer in an Ultracold Bose-Fermi Mixture, arXiv:2411.04820v1 (2024).
