Spectroscopy of Ultracold, Trapped Cesium Feshbach Molecules

Abstract

We explore the rich internal structure of Cs_2 Feshbach molecules. Pure ultracold molecular samples are prepared in a CO_2-laser trap, and a multitude of weakly bound states is populated by elaborate magnetic-field ramping techniques. Our methods use different Feshbach resonances as input ports and various internal level crossings for controlled state transfer. We populate higher partial-wave states of up to eight units of rotational angular momentum (l-wave states). We investigate the molecular structure by measurements of the magnetic moments for various states. Avoided level crossings between different molecular states are characterized through the changes in magnetic moment and by a Landau-Zener tunneling method. Based on microwave spectroscopy, we present a precise measurement of the magnetic-field dependent binding energy of the weakly bound s-wave state that is responsible for the large background scattering length of Cs. This state is of particular interest because of its quantum-halo character.

arXiv comment15 pages, 12 figures, 4 tables

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Cited by in corpus (59)

• Feshbach Resonances in Ultracold Gases
• Landau-Zener-Stuckelberg interferometry
• Quantum Gas of Deeply Bound Ground State Molecules
• Quantum gas of rovibronic ground-state molecules in an optical lattice
• Observation of an Efimov-like resonance in ultracold atom-dimer scattering
• Universality of the Three-Body Parameter for Efimov States in Ultracold Cesium
• Nonadiabatic Landau-Zener-Stückelberg-Majorana transitions, dynamics, and interference
• Formation and interactions of cold and ultracold molecules: new challenges for interdisciplinary physics
• Amplitude Spectroscopy of a Solid-State Artificial Atom
• Calculations of static dipole polarizabilities of alkali dimers. Prospects for alignment of ultracold molecules
• Feshbach spectroscopy and analysis of the interaction potentials of ultracold sodium
• Efimov Resonances in Ultracold Quantum Gases
• The hyperfine energy levels of alkali metal dimers: ground-state polar molecules in electric and magnetic fields
• Feshbach resonances, weakly bound molecular states and coupled-channel potentials for cesium at high magnetic fields
• Observation of interspecies Feshbach resonances in an ultracold Rb-Cs mixture
• Collisional Properties of p-Wave Feshbach Molecules
• Determination of atomic scattering lengths from measurements of molecular binding energies near Feshbach resonances
• Ultracold Dipolar Molecules Composed of Strongly Magnetic Atoms
• Three-body correlation functions and recombination rates for bosons in three and one dimensions
• Magnetically Controlled Exchange Process in an Ultracold Atom-Dimer Mixture
• The prospects of forming ultracold molecules in ${}^2\Sigma$ states by magnetoassociation of alkali-metal atoms with Yb
• Superfluidity and phase transitions in a resonant Bose gas
• Deformation of a quantum many-particle system by a rotating impurity
• Production of optically trapped ${}^{87}$RbCs Feshbach molecules
• Cruising through molecular bound state manifolds with radio frequency
• Collisions between tunable halo dimers: exploring an elementary four-body process with identical bosons
• Quantum Simulations of Extended Hubbard Models with Dipolar Crystals
• Ultracold molecules from ultracold atoms: a case study with the KRb molecule
• Feshbach spectroscopy and scattering properties of ultracold Li+Na mixtures
• Large-amplitude driving of a superconducting artificial atom: Interferometry, cooling, and amplitude spectroscopy
• Avoided crossings between bound states of ultracold Cesium dimers
• Dark resonances for ground state transfer of molecular quantum gases
• Three Resonant Ultra-Cold Bosons: Off-Resonance Effects
• Coupled $\ell$-wave confinement-induced resonances in cylindrically symmetric waveguides
• A high phase-space density mixture of ${}^{87}$Rb and ${}^{133}$Cs: towards ultracold heteronuclear molecules
• Resonant atom-dimer collisions in cesium: Testing universality at positive scattering lengths
• Multi-level interference resonances in strongly-driven three-level systems
• Deeply bound ultracold molecules in an optical lattice
• Metastable Feshbach Molecules in High Rotational States
• Spatial Landau-Zener-Stückelberg interference in spinor Bose-Einstein condensates
• Impact of Electric Fields on Highly Excited Rovibrational States of Polar Dimers
• Precision molecular spectroscopy for ground state transfer of molecular quantum gases
• Ultracold bosons in the vicinity of a narrow resonance: shallow dimer and recombination
• Application of B-splines to determining eigen-spectrum of Feshbach molecules
• Above threshold scattering about a Feshbach resonance for ultracold atoms in an optical collider
• Optically trapped Feshbach molecules of fermionic 161Dy and 40K
• Collisions of Ultracold Trapped Cesium Feshbach Molecules
• Few-body physics of ultracold atoms and molecules with long-range interactions
• Universality in s-wave and higher partial wave Feshbach resonances: an illustration with a single atom near two scattering centers
• Fano effect in an ultracold atom-molecule coupled system
• Observation of an Efimov resonance in an ultracold mixture of atoms and weakly bound dimers
• Analytical treatment of bosonic d-wave scattering in isotropic harmonic waveguides
• Ultracold and dense samples of ground-state molecules in lattice potentials
• Observation of self-oscillating supersonic flow across an acoustic horizon in two dimensions
• Repeated output coupling of ultracold Feshbach molecules from a Cs BEC
• Lifetime of Excitations in Atomic and Molecular Bose-Einstein Condensates
• Optically trapped Feshbach molecules of fermionic ${}^{161}$Dy and ${}^{40}$K: Role of light-induced and collisional losses
• Observation of high partial-wave Feshbach resonances in ${}^{39}$K Bose-Einstein condensates
• Observation of modulation-induced Feshbach resonance