Formation of Ultracold NaRb Feshbach Molecules

Abstract

We report the creation of ultracold bosonic ${}^{23}$Na${}^{87}$Rb Feshbach molecules via magneto-association. By ramping the magnetic field across an interspecies Feshbach resonance, at least 4000 molecules can be produced out of the near degenerate ultracold mixture. Fast loss due to inelastic atom-molecule collisions is observed, which limits the pure molecule number, after residual atoms removal, to 1700. The pure molecule sample can live for 21.8(8) ms in the optical trap, long enough for future molecular spectroscopy studies toward coherently transferring to the singlet ro-vibrational ground state, where these molecules are stable against chemical reaction and have a permanent electric dipole moment of 3.3 Debye. We have also measured the Feshbach molecule's binding energy near the Feshbach resonance by the oscillating magnetic field method and found these molecules have a large closed-channel fraction.

arXiv comment5 figures

References in corpus (30)

• Feshbach Resonances in Ultracold Gases
• A High Phase-Space-Density Gas of Polar Molecules
• Quantum computation with trapped polar molecules
• A toolbox for lattice spin models with polar molecules
• Production of cold molecules via magnetically tunable Feshbach resonances
• Quantum-State Controlled Chemical Reactions of Ultracold KRb Molecules
• Dipolar collisions of polar molecules in the quantum regime
• Ultracold dense samples of dipolar RbCs molecules in the rovibrational and hyperfine ground state
• Creation of ultracold ${}^{87}$RbCs molecules in the rovibrational ground state
• Controlling the quantum stereodynamics of ultracold bimolecular reactions
• Calculation of accurate permanent dipole moments of the lowest ${}^{1,3}{\Sigma }^{+}$ states of heteronuclear alkali dimers using extended basis sets
• Ultracold heteronuclear molecules in a 3D optical lattice
• Ultracold dense gas of deeply bound heteronuclear molecules
• Precision Test of Mass Ratio Variations with Lattice-Confined Ultracold Molecules
• Long-lived dipolar molecules and Feshbach molecules in a 3D optical lattice
• Reactions of ultracold alkali metal dimers
• Ultracold Fermionic Feshbach Molecules of ${}^{23}$Na${}^{40}$K
• Rapid production of ${}^{87}$Rb BECs in a combined magnetic and optical potential
• Coherent optical transfer of Feshbach molecules to a lower vibrational state
• Long-lived Feshbach molecules in a 3D optical lattice
• Creation of a dipolar superfluid in optical lattices
• Production Efficiency of Ultracold Feshbach Molecules in Bosonic and Fermionic Systems
• Ultracold Molecule Production Via a Resonant Oscillating Magnetic Field
• Formation of Ultracold Fermionic NaLi Feshbach Molecules
• Determination of atomic scattering lengths from measurements of molecular binding energies near Feshbach resonances
• Radio-Frequency Transitions on Weakly-Bound Ultracold Molecules
• Association of ultracold double-species bosonic molecules
• Production of optically trapped ${}^{87}$RbCs Feshbach molecules
• Observation of Feshbach resonances between ultracold Na and Rb atoms
• Association of molecules using a resonantly modulated magnetic field

Cited by in corpus (31)

• Creation of an ultracold gas of ground-state ${}^{23}{\mathrm{Na}}^{87}\mathrm{Rb}$ molecules
• Collisions of ultracold ^{23}Na^{87}Rb molecules with controlled chemical reactivities
• Probing photoinduced two-body loss of ultracold non-reactive bosonic ${}^{23}$Na${}^{87}$Rb and ${}^{23}$Na${}^{39}$K molecules
• Dipolar Collisions of Ultracold Ground-state Bosonic Molecules
• Magnetic Feshbach resonances in collisions of ${}^{23}$Na${}^{40}$K with ${}^{40}$K
• High-resolution Internal State Control of Ultracold ${}^{23}$Na${}^{87}$Rb Molecules
• Observation of the Hanbury Brown and Twiss Effect with Ultracold Molecules
• Ultracold nonreactive molecules in an optical lattice: connecting chemistry to many-body physics
• A High Phase-Space Density Gas of NaCs Feshbach Molecules
• High Resolution Molecular Spectroscopy for Producing Ultracold Absolute Ground-State ${}^{23}$Na${}^{87}$Rb Molecules
• Ab Initio Study of Chemical Reactions of Cold SrF and CaF Molecules with Alkali-Metal and Alkaline-Earth-Metal Atoms
• Improved characterization of Feshbach resonances and interaction potentials between ${}^{23}$Na and ${}^{87}$Rb atoms
• Microscopic derivation of multi-channel Hubbard models for ultracold nonreactive molecules in an optical lattice
• Formation of ultracold weakly bound dimers of bosonic ${}^{23}{\text{Na}}^{39}\text{K}$
• Above threshold scattering about a Feshbach resonance for ultracold atoms in an optical collider
• Photoassociation of Ultracold NaLi
• Lattice model parameters for ultracold nonreactive molecules: chaotic scattering and its limitations
• Optically trapped Feshbach molecules of fermionic 161Dy and 40K
• Prospects of forming high-spin polar molecules from ultracold atoms
• Detection of NaRb Feshbach molecule by photodissociation
• Long-range states of the NaRb molecule near the Na($3^2{S}_{1/2}$)+Rb($5^2{P}_{3/2}$) asymptote
• Efficient Adiabatic Rapid Passage in the Presence of Noise
• Characterization of the lowest excited-state ro-vibrational level of ${}^{23}$Na${}^{87}$Rb
• Exact quantum field mappings between different experiments on quantum gases
• Bosonic molecules in a lattice: unusual fluid phase from multichannel interactions
• Efficiency limitation for realizing an atom-molecule adiabatic transfer based on a chainwise system
• Tunable Fujita-Miyazawa-Type Three-Body Force in Ultracold Atoms
• Observation of coherent oscillations in association of dimers from a thermal gas of ultracold atoms
• Formation of ultracold ${}^{39}$K${}^{133}$Cs Feshbach molecules
• Delta-Kick Collimation of Heteronuclear Feshbach Molecules
• Frustrated plane-polarized dipoles in one dimension