Feshbach resonances, weakly bound molecular states and coupled-channel potentials for cesium at high magnetic fields

Abstract

We explore the scattering properties of ultracold ground-state Cs atoms at magnetic fields between 450 G (45 mT) and 1000 G. We identify 17 new Feshbach resonances, including two very broad ones near 549 G and 787 G. We measure the binding energies of several different dimer states by magnetic field modulation spectroscopy. We use least-squares fitting to these experimental results, together with previous measurements at lower field, to determine a new 6-parameter model of the long-range interaction potential, designated M2012. Coupled-channels calculations using M2012 provide an accurate mapping between the s-wave scattering length and the magnetic field over the entire range of fields considered. This mapping is crucial for experiments that rely on precise tuning of the scattering length, such as those on Efimov physics.

19 pages, 18 figures

References in corpus (16)

• Quantum Gas of Deeply Bound Ground State Molecules
• Collisional stability of a three-component degenerate Fermi gas
• Three-body recombination in a three-state Fermi gas with widely tunable interactions
• Three-body recombination at large scattering lengths in an ultracold atomic gas
• Control of Interaction-Induced Dephasing of Bloch Oscillations
• Observation of universality in ultracold 7Li three-body recombination
• Feshbach resonances in ultracold atomic and molecular collisions: threshold behaviour and suppression of poles in scattering lengths
• Limits on Universality in Ultracold Three-Boson Recombination
• Determination of atomic scattering lengths from measurements of molecular binding energies near Feshbach resonances
• Optimized production of a cesium Bose-Einstein condensate
• Association of ultracold double-species bosonic molecules
• Ultracold atom-molecule collisions and bound states in magnetic fields: tuning zero-energy Feshbach resonances in He-NH (3Sigma-)
• Spectroscopy of Ultracold, Trapped Cesium Feshbach Molecules
• Avoided crossings between bound states of ultracold Cesium dimers
• Metastable Feshbach Molecules in High Rotational States
• Collisional and molecular spectroscopy in an ultracold Bose-Bose mixture

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• Quantum Engineering of a Low-Entropy Gas of Heteronuclear Bosonic Molecules in an Optical Lattice
• Universal van der Waals Physics for Three Ultracold Atoms
• Heteronuclear Efimov scenario with positive intraspecies scattering length
• Contrasting the wide Feshbach resonances in ${}^6$Li and ${}^7$Li
• Observation of "broad" d-wave Feshbach resonances with a triplet structure
• Observation of interspecies Feshbach resonances in an ultracold ${}^{39}$K-${}^{133}$Cs mixture and refinement of interaction potentials
• Many-body Chemical Reactions in a Quantum Degenerate Gas
• Resonant atom-dimer collisions in cesium: Testing universality at positive scattering lengths
• Pinpointing Feshbach Resonances and Testing Efimov Universalities in ${}^{39}$K
• Universality of weakly bound dimers and Efimov trimers close to Li-Cs Feshbach resonances
• Overlapping Bose-Einstein Condensates of ${}^{23}$Na and ${}^{133}$Cs
• A High Phase-Space Density Gas of NaCs Feshbach Molecules
• Quantum defect model of a reactive collision at finite temperature
• The three-body parameter for Efimov states in lithium-6
• Sound propagation in a Bose-Fermi mixture: from weak to strong interactions
• Feshbach resonances, molecular bound states and prospects of ultracold molecule formation in mixtures of ultracold K and Cs
• Probing open- and closed-channel p-wave resonances
• Improved characterization of Feshbach resonances and interaction potentials between ${}^{23}$Na and ${}^{87}$Rb atoms
• Finite-temperature effects on a triatomic Efimov resonance in ultracold cesium
• Efimovian three-body potential from broad to narrow Feshbach resonances
• Observation of confinement-induced resonances in a 3D lattice
• Dynamics of a degenerate Cs-Yb mixture with attractive interspecies interactions
• Interferometric measurement of micro-g acceleration with levitated atoms
• Atomic Clock Measurements of Quantum Scattering Phase Shifts Spanning Feshbach Resonances at Ultralow Fields
• Efimov resonance position near a narrow Feshbach resonance in ${}^6$Li-${}^{133}$Cs mixture
• Feshbach Spectroscopy of Cs Atom Pairs in Optical Tweezers
• Experimental Observation of Single- and Multisite Matter-Wave Solitons in an Optical Accordion Lattice
• Dynamical excitation processes and correlations of three-body two-dimensional mixtures
• Spin hierarchy in van der Waals molecule formation via ultracold three-body recombination
• Dissipative preparation of a Floquet topological insulator in an optical lattice via bath engineering
• Efimov states in Li-Cs mixtures within a minimal model
• Precision Measurement of Spin-Dependent Dipolar Splitting in ${}^6$Li p-Wave Feshbach Resonances
• Spin structure of diatomic van der Waals molecules of alkali atoms
• Repeated output coupling of ultracold Feshbach molecules from a Cs BEC
• Tunable optical lattices for the creation of matter-wave lattice solitons
• Observation of high partial-wave Feshbach resonances in ${}^{39}$K Bose-Einstein condensates
• Observation of modulation-induced Feshbach resonance
• Lifetime of Excitations in Atomic and Molecular Bose-Einstein Condensates
• Magnetic Feshbach resonances in ${}^7\text{Li}{-}^{133}\text{Cs}$ mixtures
• Formation of ultracold ${}^{39}$K${}^{133}$Cs Feshbach molecules
• Characterization of Feshbach resonances in ${}^6\mathrm{Li}{-}^7\mathrm{Li}$ using improved interaction potentials
• Quantum Degenerate Mixtures of Cs and Yb