Production of optically trapped ${}^{87}$RbCs Feshbach molecules

Abstract

We report the production of ${}^{87}$RbCs Feshbach molecules in a crossed-beam dipole trap. A mixture of ${}^{87}$Rb and ${}^{133}$Cs is cooled close to quantum degeneracy before an interspecies Feshbach resonance at 197\,G is used to associate up to $\sim 5000$ molecules with a temperature of $\sim 300$\,nK. The molecules are confined in the dipole trap with a lifetime of 0.21(1)\,s, long enough for future experiments exploring optical transfer to the absolute ground state. We have measured the magnetic moment of the Feshbach molecules in a magnetic bias field range between 181 and 185\,G to demonstrate the ability to control the character of the molecular state. In addition we have performed Feshbach spectroscopy in a field range from 0 to 1200\,G and located three previously unobserved resonances at high magnetic fields.

9 pages, 7 figures

References in corpus (19)

• A High Phase-Space-Density Gas of Polar Molecules
• Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron
• Oscillations and interactions of dark and dark-bright solitons in Bose-Einstein condensates
• Quantum Gas of Deeply Bound Ground State Molecules
• Ultracold Molecules in the Ro-Vibrational Triplet Ground State
• Exploring an ultracold Fermi-Fermi mixture: Interspecies Feshbach resonances and scattering properties of 6Li and 40K
• Reactions of ultracold alkali metal dimers
• Dual-Species Bose-Einstein Condensate of ${}^{87}$Rb and ${}^{133}$Cs
• Enhanced sensitivity to variation of the fine structure constant and m_p/m_e in diatomic molecules
• Fast, Runaway Evaporative Cooling to Bose-Einstein Condensation in Optical Traps
• Feshbach resonances, weakly bound molecular states and coupled-channel potentials for cesium at high magnetic fields
• Production of a dual-species Bose-Einstein condensate of Rb and Cs atoms
• Dissociation of ultracold molecules with Feshbach resonances
• Spectroscopy of Ultracold, Trapped Cesium Feshbach Molecules
• Equilibrium solutions of immiscible two-species Bose-Einstein condensates in perturbed harmonic traps
• Feshbach resonances in ultracold 85Rb
• A high phase-space density mixture of ${}^{87}$Rb and ${}^{133}$Cs: towards ultracold heteronuclear molecules
• Feshbach spectroscopy of an ultracold mixture of ${}^{85}$Rb and ${}^{133}$Cs
• Magnetic trapping of a cold Rb-Cs atomic mixture

Cited by in corpus (39)

• 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
• Ultracold molecules for quantum simulation: rotational coherences in CaF and RbCs
• Sticky collisions of ultracold RbCs molecules
• Loss of ultracold RbCs molecules via optical excitation of long-lived two-body collision complexes
• Controlling the Rotational and Hyperfine State of Ultracold ${}^{87}$Rb${}^{133}$Cs Molecules
• Formation of ultracold molecules by merging optical tweezers
• Formation of Ultracold NaRb Feshbach Molecules
• Observation of "broad" d-wave Feshbach resonances with a triplet structure
• Two-Photon Pathway to Ultracold Ground State Molecules of ${}^{23}$Na${}^{40}$K
• Two-photon photoassociation spectroscopy of CsYb: ground-state interaction potential and interspecies scattering lengths
• AC Stark Effect in Ultracold Polar RbCs Molecules
• A Simple, Versatile Laser System for the Creation of Ultracold Ground State Molecules
• Observation of Rydberg blockade due to the charge-dipole interaction between an atom and a polar molecule
• Optical Trapping of a Polyatomic Molecule in an $\ell$-Type Parity Doublet State
• Controlling the ac Stark effect of RbCs with dc electric and magnetic fields
• Production and characterization of a dual species magneto-optical trap of cesium and ytterbium
• Preparation of one ${}^{87}$Rb and one ${}^{133}$Cs atom in a single optical tweezer
• Interspecies thermalization in an ultracold mixture of Cs and Yb in an optical trap
• A High Phase-Space Density Gas of NaCs Feshbach Molecules
• Broad Feshbach resonances in ultracold alkali-metal systems
• Feshbach resonances, molecular bound states and prospects of ultracold molecule formation in mixtures of ultracold K and Cs
• Feshbach Loss Spectroscopy in an Ultracold ${}^{23}$Na and ${}^{40}$K Mixture
• Coherent Manipulation of the Internal State of Ultracold ${}^{87}$Rb${}^{133}$Cs Molecules with Multiple Microwave Fields
• Measurement of the binding energy of ultracold ${}^{87}$Rb${}^{133}$Cs molecules using an offset-free optical frequency comb
• Preparation of ${}^{87}$Rb and ${}^{133}$Cs in the motional ground state of a single optical tweezer
• Enhanced association and dissociation of heteronuclear Feshbach molecules in a microgravity environment
• Microscopic derivation of multi-channel Hubbard models for ultracold nonreactive molecules in an optical lattice
• Photoassociation of Ultracold NaLi
• Lattice model parameters for ultracold nonreactive molecules: chaotic scattering and its limitations
• Enhanced quantum state transfer via feedforward cancellation of optical phase noise
• Bose-Einstein condensation of heteronuclear bound states formed in a Fermi gas of two atomic species: microscopic approach
• Optically trapped Feshbach molecules of fermionic 161Dy and 40K
• Driving the formation of the RbCs dimer by a laser pulse. A nonlinear dynamics approach
• Bosonic molecules in a lattice: unusual fluid phase from multichannel interactions
• Robust storage qubits in ultracold polar molecules
• Emergent four-body parameter in universal two-species bosonic systems
• Molecule-molecule and atom-molecule collisions with ultracold RbCs molecules
• Delta-Kick Collimation of Heteronuclear Feshbach Molecules