Observation of Feshbach resonances between ultracold Na and Rb atoms

Abstract

We have successfully prepared an optically trapped ultracold mixture of ${}^{23}$Na and ${}^{87}$Rb atoms and studied their interspecies Feshbach resonances. Using two different spin combinations, several s-wave and p-wave resonances are identified by observing a high inelastic loss and a temperature rising for both species near resonant magnetic field values. The two s-wave resonances observed below 500 G between atoms in the lowest energy level are possible candidates for Feshbach molecule association. Our results are well characterized by a coupled-channel model and are used refining the ground state interaction potentials between ${}^{23}$Na and ${}^{87}$Rb. This work opens up the prospect for preparing ultracold ensembles of ground-state bosonic NaRb molecules which are chemically stable and can provide strong dipolar interactions.

With major modifications, published in Phys. Rev A(R),87, 050702(2013)

References in corpus (8)

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Cited by in corpus (31)

• Creation of an ultracold gas of ground-state ${}^{23}{\mathrm{Na}}^{87}\mathrm{Rb}$ molecules
• Lee-Huang-Yang effects in the ultracold mixture of ${}^{23}$Na and ${}^{87}$Rb with attractive interspecies interactions
• A double species ${}^{23}$Na and ${}^{87}$Rb Bose-Einstein condensate with tunable miscibility via an interspecies Feshbach resonance
• Formation of Ultracold NaRb Feshbach Molecules
• Expansion dynamics of a shell-shaped Bose-Einstein condensate
• Dipolar Collisions of Ultracold Ground-state Bosonic Molecules
• Thermal suppression of phase separation in condensate mixtures
• High-resolution Internal State Control of Ultracold ${}^{23}$Na${}^{87}$Rb Molecules
• Coherent heteronuclear spin dynamics in an ultracold spin-1 mixture
• Observation of broad p-wave Feshbach resonances in ultracold ${}^{85}$Rb-${}^{87}$Rb mixtures
• Observation of dipolar splittings in high-resolution atom-loss spectroscopy of ${}^6$Li $p$-wave Feshbach resonances
• Broad Feshbach resonances in ultracold alkali-metal systems
• Complexes formed in collisions between ultracold alkali-metal diatomic molecules and atoms
• High Resolution Molecular Spectroscopy for Producing Ultracold Absolute Ground-State ${}^{23}$Na${}^{87}$Rb Molecules
• Model for the hyperfine structure of electronically-excited $\mathrm{KCs}$ molecules
• Coherent spin mixing dynamics in thermal ${}^{87}$Rb spin-1 and spin-2 gases
• Enhanced association and dissociation of heteronuclear Feshbach molecules in a microgravity environment
• Improved characterization of Feshbach resonances and interaction potentials between ${}^{23}$Na and ${}^{87}$Rb atoms
• Multichannel quantum-defect theory for magnetic Feshbach resonances in heteronuclear group I systems
• Long-range states of the NaRb molecule near the Na($3^2{S}_{1/2}$)+Rb($5^2{P}_{3/2}$) asymptote
• Miscibility of Binary Bose-Einstein Condensates with $p$-wave Interaction
• Inelastic collisions in radiofrequency-dressed mixtures of ultracold atoms
• Characterization of the lowest excited-state ro-vibrational level of ${}^{23}$Na${}^{87}$Rb
• Evolution of Goldstone mode in binary condensate mixtures
• Magnetic Feshbach resonances in collisions of non-magnetic closed-shell ${}^1\Sigma$ molecules
• Laser Control of Singlet-Pairing Process in an Ultracold Spinor Mixture
• Fragmentation of a spin-1 mixture in a magnetic field
• Equilibration of a finite temperature binary Bose gas formed by population transfer
• Precision Measurement of Spin-Dependent Dipolar Splitting in ${}^6$Li p-Wave Feshbach Resonances
• Roaming pathways and survival probability in real-time collisional dynamics of cold and controlled bialkali molecules
• Delta-Kick Collimation of Heteronuclear Feshbach Molecules