Observation of low-field Feshbach resonances between ${}^{161}$Dy and ${}^{40}$K

Abstract

We report on the observation of Feshbach resonances at low magnetic field strength (below 10 G) in the Fermi-Fermi mixture of ${}^{161}$Dy and ${}^{40}$K. We characterize five resonances by measurements of interspecies thermalization rates and molecular binding energies. As a case of particular interest for applications, we consider a resonance near 7.29 G, which combines accurate magnetic tunability and access to the universal regime of interactions with experimental simplicity. We show that lifetimes of a few 100 ms can be achieved for the optically trapped, resonantly interacting mixture. We also demonstrate the hydrodynamic expansion of the mixture in the strongly interacting regime and the formation of DyK Feshbach molecules. Our work opens up new experimental possibilities in view of mass-imbalanced superfluids and related phenomena.

References in corpus (44)

• Feshbach Resonances in Ultracold Gases
• Creation of ultracold molecules from a Fermi gas of atoms
• Weakly bound dimers of fermionic atoms
• Ultrafast many-body interferometry of impurities coupled to a Fermi sea
• Measurement of interaction energy near a Feshbach resonance in a 6Li Fermi gas
• Exploring an ultracold Fermi-Fermi mixture: Interspecies Feshbach resonances and scattering properties of 6Li and 40K
• Three-body recombination at large scattering lengths in an ultracold atomic gas
• The BCS-BEC crossover: From ultra-cold Fermi gases to nuclear systems
• Quantum degenerate two-species Fermi-Fermi mixture coexisting with a Bose-Einstein condensate
• Three-boson problem near a narrow Feshbach resonance
• Imbalanced Feshbach-resonant Fermi gases
• Ultracold Heteronuclear Fermi-Fermi Molecules
• Quantum degenerate mixtures of alkali and alkaline-earth-like atoms
• Decay of an ultracold fermionic lithium gas near a Feshbach resonance
• Lifetime of molecule-atom mixtures near a Feshbach resonance in 40K
• Very high precision bound state spectroscopy near a ${}^{85}$Rb Feshbach resonance
• Tests of universal three-body physics in an ultracold Bose-Fermi mixture
• Emergence of chaotic scattering in ultracold Er and Dy
• A long-lived spin-orbit-coupled degenerate dipolar Fermi gas
• Mixture of ultracold lithium and cesium atoms in an optical dipole trap
• Diatomic molecules in ultracold Fermi gases - Novel composite bosons
• Imbalanced Fermi Gases at Unitarity
• Probing the Interface of a Phase-Separated State in a Repulsive Bose-Fermi Mixture
• Atom-dimer and dimer-dimer scattering in fermionic mixtures near a narrow Feshbach resonance
• Production of a degenerate Fermi-Fermi mixture of dysprosium and potassium atoms
• Feshbach resonances in the 6Li-40K Fermi-Fermi mixture: Elastic versus inelastic interactions
• Observation of a Strong Atom-Dimer Attraction in a Mass-Imbalanced Fermi-Fermi Mixture
• Spectroscopy of a narrow-line laser cooling transition in atomic dysprosium
• Universal three-body physics in ultracold KRb mixtures
• Accurate Determination of the Dynamical Polarizability of Dysprosium
• Resonantly Interacting Fermi-Fermi Mixture of ${}^{161}$Dy and ${}^{40}$K
• Lifshitz Point in the Phase Diagram of Resonantly Interacting ${}^{6}Li$-${}^{40}K$ Mixtures
• Feshbach resonances in $p$-wave three-body recombination within Fermi-Fermi mixtures of open-shell ${}^6$Li and closed-shell ${}^{173}$Yb atoms
• Thermometry of a deeply degenerate Fermi gas with a Bose-Einstein condensate
• Enhancement effect of mass imbalance on Fulde-Ferrell-Larkin-Ovchinnikov type of pairing in Fermi-Fermi mixtures of ultracold quantum gases
• Random to chaotic temperature transition in low-field Fano-Feshbach resonances of cold thulium atoms
• Magnetically tunable Feshbach resonances in Li+Er
• Exploring ultracold collisions in ${}^6$Li-${}^{53}$Cr Fermi mixtures: Feshbach resonances and scattering properties of a novel alkali-transition metal system
• A High Phase-Space Density Gas of NaCs Feshbach Molecules
• Realization of a Cold Mixture of Fermionic Chromium and Lithium Atoms
• Beyond-mean-field description of a trapped unitary Fermi gas with mass and population imbalance
• Lifetime of Feshbach dimers in a Fermi-Fermi mixture of ${}^6$Li and ${}^{40}$K
• Efimov scenario for overlapping narrow Feshbach resonances
• Efimov resonance position near a narrow Feshbach resonance in ${}^6$Li-${}^{133}$Cs mixture

Cited by in corpus (7)

• Realization of a quantum degenerate mixture of highly magnetic and nonmagnetic atoms
• Observation of Feshbach resonances in an ${}^{167}$Er-${}^6$Li Fermi-Fermi mixture
• Optically trapped Feshbach molecules of fermionic 161Dy and 40K
• Dipole-Mode Spectrum and Hydrodynamic Crossover in a Resonantly Interacting Two-Species Fermion Mixture
• Observation of coherent oscillations in association of dimers from a thermal gas of ultracold atoms
• Optically trapped Feshbach molecules of fermionic ${}^{161}$Dy and ${}^{40}$K: Role of light-induced and collisional losses
• Van der Waals coefficients for interactions of dysprosium and erbium atoms with alkali-metal and alkaline-earth-metal atoms