Control of the interaction in a Fermi-Bose mixture

Abstract

We control the interspecies interaction in a two-species atomic quantum mixture by tuning the magnetic field at a Feshbach resonance. The mixture is composed by fermionic 40K and bosonic 87Rb. We observe effects of the large attractive and repulsive interaction energy across the resonance, such as collapse or a reduced spatial overlap of the mixture, and we accurately locate the resonance position and width. Understanding and controlling instabilities in this mixture opens the way to a variety of applications, including formation of heteronuclear molecular quantum gases.

5 Pages

References in corpus (12)

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• Localization of bosonic atoms by fermionic impurities in a 3d optical lattice
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• Mixtures of Bosonic and Fermionic Atoms in Optical Lattices
• Tuning of heteronuclear interactions in a quantum-degenerate Fermi-Bose mixture
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Cited by in corpus (32)

• Theory of ultracold Fermi gases
• Double species condensate with tunable interspecies interactions
• Dual-Species Bose-Einstein Condensate of ${}^{87}$Rb and ${}^{133}$Cs
• Feshbach resonances in ultracold K(39)
• Realization of a strongly interacting Bose-Fermi mixture from a two-component Fermi gas
• Supersolid Bose-Fermi Mixtures in Optical Lattices
• Accurate near-threshold model for ultracold KRb dimers from interisotope Feshbach spectroscopy
• Superfluidity at the BEC-BCS crossover in two-dimensional Fermi gases with population and mass imbalance
• Phase separation and collapse in Bose-Fermi mixtures with a Feshbach resonance
• Tightly bound gap solitons in a Fermi gas
• Collisional properties of weakly bound heteronuclear dimers
• Heteronuclear molecules in an optical lattice: Theory and experiment
• Superfluid pairing between fermions with unequal masses
• Bose-Fermi Pair Correlations in Attractively Interacting Bose-Fermi Atomic Mixtures
• Supersolidity of cold-atom Bose-Fermi mixtures in optical lattices
• p-Wave superfluid and phase separation in atomic Bose-Fermi mixture
• Superfluid and Mott Insulator phases of one-dimensional Bose-Fermi mixtures
• Generalized Dynamical Mean-Field Theory for Bose-Fermi Mixtures in Optical Lattices
• Conversion of ${}^{40}$K-${}^{87}$Rb mixtures into stable molecules
• Miscibility in a degenerate fermionic mixture induced by linear coupling
• Superfluidity near phase separation in Bose-Fermi mixtures
• Mixing-demixing transition and collapse of a vortex state in a quasi-two-dimensional boson-fermion mixture
• Trapped Phase-Segregated Bose-Fermi Mixtures and their Collective Excitations
• Stability and pairing in quasi-one-dimensional Bose-Fermi mixtures
• Collective oscillations of a Bose-Fermi mixture: Effect of unequal mass of Bose and Fermi particles
• Analogy electromagnetism-acoustics: Validation and application to local impedance active control for sound absorption
• Mixing of ultracold atomic clouds by merging of two magnetic traps
• Heteronuclear quantum gas mixtures
• Two-dimensional boson-fermion mixtures
• Anderson localization in a correlated fermionic mixture
• Position swapping and pinching in Bose-Fermi mixtures with two-color optical Feshbach resonances
• Collective Excitations of Harmonically Trapped Ideal Gases