Low-field Feshbach resonances and three-body losses in a fermionic quantum gas of ${}^{161}$Dy

Abstract

We report on high-resolution Feshbach spectroscopy on a degenerate, spin-polarized Fermi gas of ${}^{161}$Dy atoms, measuring three-body recombination losses at low magnetic field. For field strength up to 1\,G, we identify as much as 44 resonance features and observe plateaus of very low losses. For four selected typical resonances, we study the dependence of the three-body recombination rate coefficient on the magnetic resonance detuning and on the temperature. We observe a strong suppression of losses with decreasing temperature already for small detunings from resonance. The characterization of complex behavior of three-body losses of fermionic ${}^{161}$Dy is important for future applications of this peculiar species in research on atomic quantum gases.

10 pages, 5 figures

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