Production of a degenerate Fermi-Fermi mixture of dysprosium and potassium atoms

Abstract

We report on the realization of a mixture of fermionic ${}^{161}$Dy and fermionic ${}^{40}$K where both species are deep in the quantum-degenerate regime. Both components are spin-polarized in their absolute ground states, and the low temperatures are achieved by means of evaporative cooling of the dipolar dysprosium atoms together with sympathetic cooling of the potassium atoms. We describe the trapping and cooling methods, in particular the final evaporation stage, which leads to Fermi degeneracy of both species. Analyzing cross-species thermalization we obtain an estimate of the magnitude of the inter-species $s$-wave scattering length at low magnetic field. We demonstrate magnetic levitation of the mixture as a tool to ensure spatial overlap of the two components. The properties of the Dy-K mixture make it a very promising candidate to explore the physics of strongly interacting mass-imbalanced Fermi-Fermi mixtures.

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• Collisional Cooling of Ultracold Molecules
• Feshbach Resonances in an Erbium-Dysprosium Dipolar Mixture
• Resonantly Interacting Fermi-Fermi Mixture of ${}^{161}$Dy and ${}^{40}$K
• Low-dimensional quantum gases in curved geometries
• Study of the inter-species interactions in an ultracold dipolar mixture
• Breathing Mode of a BEC Repulsively Interacting with a Fermionic Reservoir
• Vortices in dipolar Bose-Einstein condensates
• Experimental conditions for observation of electron-hole superfluidity in GaAs heterostructures
• Realization of a Cold Mixture of Fermionic Chromium and Lithium Atoms
• Signatures of unconventional pairing in spin-imbalanced one-dimensional few-fermion systems
• Anisotropic thermalization of dilute dipolar gases
• Beyond-mean-field description of a trapped unitary Fermi gas with mass and population imbalance
• Binding of heavy fermions by a single light atom in one dimension
• Quartet Superfluid in Two-dimensional Mass-imbalanced Fermi Mixtures
• Unconventional pairing in one-dimensional systems of a few mass-imbalanced ultracold fermions
• Universal tetramer and pentamer in two-dimensional fermionic mixtures
• Double-degenerate Fermi mixtures of ${}^6$Li and ${}^{53}$Cr atoms
• Observation of low-field Feshbach resonances between ${}^{161}$Dy and ${}^{40}$K
• Quantum Lifshitz points and fluctuation-induced first-order phase transitions in imbalanced Fermi mixtures
• Emergence of Crystalline Few-body Correlations in Mass-imbalanced Fermi Polarons
• Intercomponent correlations in attractive one-dimensional mass-imbalanced few-body mixtures
• Optically trapped Feshbach molecules of fermionic 161Dy and 40K
• Prospects of forming high-spin polar molecules from ultracold atoms
• One-dimensional repulsive Hubbard model with mass imbalance: Orders and filling anomaly
• Stability of a flattened dipolar binary condensate: emergence of the spin roton
• Mass-imbalance induced structures of binary atomic mixtures in box potentials
• Measurement of the dynamic polarizability of Dy atoms near the 626-nm intercombination line
• Fast and High-Yield Loading of a D${}_2$ MOT of Potassium from a Cryogenic Buffer Gas Beam
• Fast loading of a cold mixture of Sodium and Potassium atoms from compact and versatile cold atomic beam sources
• Competing few-body correlations in ultracold Fermi polarons
• Three-body bound states of two bosons and one impurity in one dimension
• Geometry-induced entanglement in a mass-imbalanced few-fermion system
• Dynamical properties of a few mass-imbalanced ultra-cold fermions confined in a double-well potential
• Confinement-Induced Resonance with Weak Background Interaction
• Spin-dipole mode in a trapped Fermi gas near unitarity
• Creation of a degenerate Bose-Bose mixture of erbium and lithium atoms
• Sudden quench of harmonically trapped mass-imbalanced fermions
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• Kovtun-Son-Starinets Conjecture and Effects of Mass Imbalance in the Normal State of an Ultracold Fermi Gas in the BCS-BEC Crossover Region
• BCS-BEC crossover of the strongly interacting ${}^6$Li-${}^{40}$K mixture
• Dipole-Mode Spectrum and Hydrodynamic Crossover in a Resonantly Interacting Two-Species Fermion Mixture
• Optically trapped Feshbach molecules of fermionic ${}^{161}$Dy and ${}^{40}$K: Role of light-induced and collisional losses
• Universal clusters in quasi-two-dimensional ultracold Fermi mixtures
• Vortices in Fermi gases with spin-dependent rotation potentials
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• Method of numerical simulation of interacting quantum gas kinetics on finite momentum lattice
• Quantum Degenerate Mixtures of Cs and Yb