Feshbach resonances in the 6Li-40K Fermi-Fermi mixture: Elastic versus inelastic interactions

Abstract

We present a detailed theoretical and experimental study of Feshbach resonances in the 6Li-40K mixture. Particular attention is given to the inelastic scattering properties, which have not been considered before. As an important example, we thoroughly investigate both elastic and inelastic scattering properties of a resonance that occurs near 155 G. Our theoretical predictions based on a coupled channels calculation are found in excellent agreement with the experimental results. We also present theoretical results on the molecular state that underlies the 155G resonance, in particular concerning its lifetime against spontaneous dissociation. We then present a survey of resonances in the system, fully characterizing the corresponding elastic and inelastic scattering properties. This provides the essential information to identify optimum resonances for applications relying on interaction control in this Fermi-Fermi mixture.

Submitted to EPJD, EuroQUAM special issues "Cold Quantum Matter - Achievements and Prospects", v2 with updated calibration of magnetic field (+4mG correction) and updated figures 4 and 6

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Cited by in corpus (43)

• Metastability and Coherence of Repulsive Polarons in a Strongly Interacting Fermi Mixture
• Ultrafast many-body interferometry of impurities coupled to a Fermi sea
• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
• Systematic study of Optical Feshbach Resonances in an ideal gas
• Decoherence of Impurities in a Fermi Sea of Ultracold Atoms
• Repulsive polarons and itinerant ferromagnetism in strongly polarized Fermi gases
• Magic-zero wavelengths of alkali-metal atoms and their applications
• Hydrodynamic Expansion of a Strongly Interacting Fermi-Fermi Mixture
• Probing the Interface of a Phase-Separated State in a Repulsive Bose-Fermi Mixture
• Production of a degenerate Fermi-Fermi mixture of dysprosium and potassium atoms
• Mediated interactions between Fermi polarons and the role of impurity quantum statistics
• 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
• Optical Feshbach resonances: Field-dressed theory and comparison with experiments
• Repulsive Fermi Polarons and Their Induced Interactions in Binary Mixtures of Ultracold Atoms
• Resonantly Interacting Fermi-Fermi Mixture of ${}^{161}$Dy and ${}^{40}$K
• Enhancement effect of mass imbalance on Fulde-Ferrell-Larkin-Ovchinnikov type of pairing in Fermi-Fermi mixtures of ultracold quantum gases
• Thermalization and Sub-Poissonian Density Fluctuations in a Degenerate Molecular Fermi Gas
• Thermodynamics of the two-component Fermi gas with unequal masses at unitarity
• Exploring ultracold collisions in ${}^6$Li-${}^{53}$Cr Fermi mixtures: Feshbach resonances and scattering properties of a novel alkali-transition metal system
• 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
• 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
• Hetero pairing and component-dependent pseudogap phenomena in an ultracold Fermi gas with mass imbalance
• Double-degenerate Fermi mixtures of ${}^6$Li and ${}^{53}$Cr atoms
• Observation of low-field Feshbach resonances between ${}^{161}$Dy and ${}^{40}$K
• Interaction beween polarons and analogous effects in polarized Fermi gases
• Phase diagrams of Fermi gases in a trap with mass and population imbalances at finite temperature
• Optically trapped Feshbach molecules of fermionic 161Dy and 40K
• Synthetic nuclear Skyrme matter in imbalanced Fermi superfluids with a multicomponent order parameter
• Atom-dimer scattering amplitude for fermionic mixtures with different masses: s-wave and p-wave contributions
• Universality of Efimov states in highly mass-imbalanced cold-atom mixtures with van der Waals and dipole interactions
• Thermal transitions, pseudogap behavior and BCS-BEC crossover in Fermi-Fermi mixtures
• Geometry-induced entanglement in a mass-imbalanced few-fermion system
• Stability of resonantly interacting heavy-light Fermi mixtures
• Pauli limited d-wave superconductors: Quantum breached pair phase and thermal transitions
• Dipole-Mode Spectrum and Hydrodynamic Crossover in a Resonantly Interacting Two-Species Fermion Mixture
• BCS-BEC crossover of the strongly interacting ${}^6$Li-${}^{40}$K mixture
• Dynamical resistivity of a few interacting fermions to the time-dependent potential barrier
• Fitting ultracold resonances without a fit
• Using an artificial electric field to create the analog of the red spot of Jupiter in light-heavy Fermi-Fermi mixtures of ultracold atoms
• Characterization of Feshbach resonances in ${}^6\mathrm{Li}{-}^7\mathrm{Li}$ using improved interaction potentials