Observation of Feshbach resonances between a single ion and ultracold atoms

Abstract

Controlling physical systems and their dynamics on the level of individual quanta propels both fundamental science and quantum technologies. Trapped atomic and molecular systems, neutral and charged, are at the forefront of quantum science. Their extraordinary level of control is evidenced by numerous applications in quantum information processing and quantum metrology. Studying the long-range interactions between these systems when combined in a hybrid atom-ion trap has lead to landmark results. Reaching the ultracold regime, however, where quantum mechanics dominates the interaction, e.g., giving access to controllable scattering resonances, has been elusive so far. Here we demonstrate Feshbach resonances between ions and atoms, using magnetically tunable interactions between ${}^{138}$Ba${}^{+}$ ions and ${}^6$Li atoms. We tune the experimental parameters to probe different interaction processes - first, enhancing three-body reactions and the related losses to identify the resonances, then making two-body interactions dominant to investigate the ion's sympathetic cooling in the ultracold atomic bath. Our results provide deeper insights into atom-ion interactions, giving access to complex many-body systems and applications in experimental quantum simulation.

13 pages, 7 figures

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• Asymptotic Bound-state Model for Feshbach Resonances
• Trapping, Shaping and Isolating of Ion Coulomb Crystals via State-selective Optical Potentials
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Cited by in corpus (46)

• Field-linked resonances of polar molecules
• Quantum mixtures of ultracold gases of neutral atoms
• Spatial imaging of a novel type of molecular ions
• Tomography of Feshbach Resonance States
• Cold trapped molecular ions and hybrid platforms for ions and neutral particles
• Observation of Chemical Reactions between a Trapped Ion and Ultracold Feshbach Dimers
• Many-body bound states and induced interactions of charged impurities in a bosonic bath
• Three-body recombination in physical chemistry
• Probing Lorentz-Invariance-Violation Induced Nonthermal Unruh Effect in Quasi-Two-Dimensional Dipolar Condensates
• Mediated interactions between ions in quantum degenerate gases
• Observation of trap-assisted formation of atom-ion bound states
• Quantum-Logic Detection of Chemical Reactions
• Active stabilization of kilogauss magnetic fields to the ppm level for magnetoassociation on ultranarrow Feshbach resonances
• Trap-assisted complexes in cold atom-ion collisions
• Quantum-limited thermometry of a Fermi gas with a charged spin particle
• Buffer gas cooling of ions in time-dependent traps using ultracold atoms
• Ultracold ion-atom experiments: cooling, chemistry, and quantum effects
• Ion-atom-atom three-body recombination: from the cold to the thermal regime
• Electric field analysis in a cold-ion source using Stark spectroscopy of Rydberg atoms
• A mobile ion in a Fermi sea
• Ion loss events in a cold Rb-Ca${}^{+}$ hybrid trap: photodissociation, black-body radiation and non-radiative charge exchange
• Modified mean field ansatz for charged polarons in a Bose-Einstein condensate
• Ab initio potential energy curves, scattering lengths, and rovibrational levels of the He${}_2^{+}$ molecular ion in excited electronic states
• Quantum control of ion-atom collisions beyond the ultracold regime
• Charged ultralong-range Rydberg trimers
• Exploring atom-ion Feshbach resonances below the s-wave limit
• Observation of quantum capture in an ion-molecule reaction
• Fermi polaron in atom-ion hybrid systems
• Ultracold Interactions between Ions and Polar Molecules
• Cold collisions between alkali and alkaline-earth hetero nuclear atom-ion system Li + Ba${}^{+}$
• Cold hybrid electrical-optical ion trap
• $In$ $situ$ observation of non-polar to strongly polar atom-ion collision dynamics
• Floquet-Engineering of Feshbach Resonances in Ultracold Gases
• Chaotic scattering and heating in cold ion-atom collisions: two sides of the same coin
• Ultracold collisions of a neutral atom with a trapped ion in 1D
• Quantum suppression of cold reactions far from the s-wave energy limit
• Strong coherent ion-electron coupling using a wire data bus
• Phonon-mediated quantum gates in trapped ions coupled to an ultracold atomic gas
• Cooling dynamics of a free ion in a Bose-Einstein condensate
• Non-resonant inter-species interaction and its effect on the position response function of cold atoms
• Harvesting entanglement from the Lorentz-violating quantum field vacuum in a dipolar Bose-Einstein condensate
• Dynamics of a Mobile Ion in a Bose-Einstein Condensate
• A versatile apparatus for simultaneous trapping of multiple species of ultracold atoms and ions to enable studies of low energy collisions and cold chemistry
• Fast Single-shot Imaging of Individual Ions via Homodyne Detection of Rydberg-Blockade-Induced Absorption
• Scattering Angle Dependence of Fano Resonance Profiles in Cold Atomic Collisions Analyzed with the Complex Valued $w$ Parameter
• Universality in Ionic Three-body Systems Near an Ion-atom Feshbach Resonance