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Feshbach resonances in p-wave three-body recombination within Fermi-Fermimixtures of open-shell 6-Li and closed-shell 173-Yb atoms

Published

Author(s)

Aliana Green, Hui Li, Jun Hui See Toh, Xinxin Tang, Katherine McCormick, Ming Li, Eite Tiesinga, Svetlana Kotochigova, Subhadeep Gupta

Abstract

We report on observations and modeling of interspecies magnetic Feshbach resonances in dilute ultracold mixtures of open-shell alkali-metal 6 Li and closed-shell 173 Yb atoms with temperatures just above quantum degeneracy for both fermionic species. Resonances are located by detecting magnetic-field-dependent atom loss due to three-body recombination. We resolve closely-located resonances that originate from a weak separation-dependent hyperfine coupling between the electronic spin of 6 Li and the nuclear spin of 173 Yb, and confirm their magnetic field spacing by ab-initio electronic-structure calculations. Through quantitative comparisons of theoretical atom-loss profiles and experimental data at various temperatures between 1 μK and 20 μK, we show that three-body recombination in fermionic mixtures has a p-wave Wigner threshold behavior leading to characteristic asymmetric loss profiles. Such resonances can be applied towards the formation of ultracold doublet ground-state molecules and quantum simulation of superfluid p-wave pairing.
Citation
Physical Review X
Volume
10

Keywords

atomic physics, laser cooling, Feshbach resonances

Citation

Green, A. , Li, H. , Toh, J. , Tang, X. , McCormick, K. , Li, M. , Tiesinga, E. , Kotochigova, S. and Gupta, S. (2020), Feshbach resonances in p-wave three-body recombination within Fermi-Fermimixtures of open-shell 6-Li and closed-shell 173-Yb atoms, Physical Review X, [online], https://dx.doi.org/10.1103/PhysRevX.10.031037, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=929374 (Accessed February 25, 2024)
Created August 14, 2020, Updated October 12, 2021