All-optical production of a degenerate mixture of 6Li and 40K and creation of heteronuclear molecules

Abstract

We present the essential experimental steps of our all-optical approach to prepare a double-degenerate Fermi-Fermi mixture of 6Li and 40K atoms, which then serves as a starting point for molecule formation. We first describe the optimized trap loading procedures, the internal-state preparation of the sample, and the combined evaporative and sympathetic cooling process. We then discuss the preparation of the sample near an interspecies Feshbach resonance, and we demonstrate the formation of heteronuclear molecules by a magnetic field ramp across the resonance.

arXiv comment13 pages, 17 figures

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• Many-Body Physics with Ultracold Gases
• Theory of ultracold Fermi gases
• Production of cold molecules via magnetically tunable Feshbach resonances
• Observation of a Strongly-Interacting Degenerate Fermi Gas of Atoms
• Exploring the Thermodynamics of a Universal Fermi Gas
• Conversion of an Atomic Fermi Gas to a Long-Lived Molecular Bose Gas
• Collisional stability of a three-component degenerate Fermi gas
• Exploring an ultracold Fermi-Fermi mixture: Interspecies Feshbach resonances and scattering properties of 6Li and 40K
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• Feshbach Resonances in Fermionic Lithium-6
• Ultracold Heteronuclear Fermi-Fermi Molecules
• Production Efficiency of Ultracold Feshbach Molecules in Bosonic and Fermionic Systems
• Magnetic control of the interaction in ultracold K-Rb mixtures
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• Broad Feshbach resonance in the 6Li-40K mixture
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Cited by in corpus (47)

• Metastability and Coherence of Repulsive Polarons in a Strongly Interacting Fermi Mixture
• Ultrafast many-body interferometry of impurities coupled to a Fermi sea
• Few-body physics with ultracold atomic and molecular systems in traps
• Formation of Ultracold Fermionic NaLi Feshbach Molecules
• Hydrodynamic Expansion of a Strongly Interacting Fermi-Fermi Mixture
• 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
• Mediated interactions between Fermi polarons and the role of impurity quantum statistics
• 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
• Stability and breakdown of Fermi polarons in a strongly interacting Fermi-Bose mixture
• Two-Photon Pathway to Ultracold Ground State Molecules of ${}^{23}$Na${}^{40}$K
• Large atom number dual-species magneto-optical trap for fermionic 6Li and 40K atoms
• Thermometry of a deeply degenerate Fermi gas with a Bose-Einstein condensate
• Sympathetic cooling in a mixture of diamagnetic and paramagnetic atoms
• Asymptotic Bound-state Model for Feshbach Resonances
• Feshbach molecule formation in a Bose-Fermi mixture
• Thermodynamics of the two-component Fermi gas with unequal masses at unitarity
• All-optical production of a superfluid Bose-Fermi mixture of ${}^6$Li and ${}^7$Li
• Realization of a Cold Mixture of Fermionic Chromium and Lithium Atoms
• Excitation properties and effects of mass imbalance in the BCS-BEC crossover regime of an ultracold Fermi gas
• Non-universal bound states of two identical heavy fermions and one light particle
• Lifetime of Feshbach dimers in a Fermi-Fermi mixture of ${}^6$Li and ${}^{40}$K
• Generation of high-purity, low-temperature samples of ${}^{39}$K for applications in metrology
• Hetero pairing and component-dependent pseudogap phenomena in an ultracold Fermi gas with mass imbalance
• Single Cs Atoms as Collisional Probes in a large Rb Magneto-Optical Trap
• Ultracold LiCr: a new pathway to quantum gases of paramagnetic polar molecules
• Double-degenerate Fermi mixtures of ${}^6$Li and ${}^{53}$Cr atoms
• Cooper pairing and BCS-BEC evolution in mixed-dimensional Fermi gases
• An Adaptable Dual Species Effusive Source and Zeeman Slower Design Demonstrated with Rb and Li
• Photoionization loss in simultaneous magneto-optical trapping of Rb and Sr
• Phase diagrams of Fermi gases in a trap with mass and population imbalances at finite temperature
• Realization of BEC-BCS crossover physics in a compact oven-loaded magneto-optic trap apparatus
• Optically trapped Feshbach molecules of fermionic 161Dy and 40K
• Fermion pairing in mixed-dimensional atomic mixtures
• Realization of a high power optical trapping setup free from thermal lensing effects
• Momentum distribution and ordering in mixtures of ultracold light and heavy fermionic atoms
• Fine Structure of Open Shell Diatomic Molecules in Combined Electric and Magnetic Fields
• Thermal transitions, pseudogap behavior and BCS-BEC crossover in Fermi-Fermi mixtures
• Detection of NaRb Feshbach molecule by photodissociation
• An ultracold, optically trapped mixture of {87}Rb and metastable {4}He atoms
• Coexistence of pairing gaps in three-component Fermi gases
• Quantum Monte Carlo study of strongly interacting Fermi gases
• Stability of resonantly interacting heavy-light Fermi mixtures
• BCS-BEC crossover of the strongly interacting ${}^6$Li-${}^{40}$K mixture
• Using an artificial electric field to create the analog of the red spot of Jupiter in light-heavy Fermi-Fermi mixtures of ultracold atoms
• d_{xy}-Density wave in fermion-fermion cold atom mixtures