Feshbach resonances in ultracold 85Rb-87Rb and 6Li-87Rb mixtures

Abstract

We present an analysis of experimentally accessible magnetic Feshbach resonances in ultra-cold hetero-nuclear 85Rb-87Rb and 6Li-87Rb mixtures. Using recent experimental measurements of the triplet scattering lengths for 6Li-87Rb and 7Li-87Rb mixtures and Feshbach resonances for one combination of atomic states, we create model potential curves and fine tune them to reproduce the measured resonances and to predict the location of several experimentally relevant resonances in Li-Rb collisions. To model 85Rb-87Rb collisions, we use accurate Rb_2 potentials obtained previously from the analysis of experiments on 87Rb-87Rb collisions. We find resonances that occur at very low magnetic fields, below 10 G, which may be useful for entanglement generation in optical lattices or atom chip magnetic traps.

8 pages, 5 figures

References in corpus (11)

• Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
• Exploring an ultracold Fermi-Fermi mixture: Interspecies Feshbach resonances and scattering properties of 6Li and 40K
• Radio-frequency dressed state potentials for neutral atoms
• Observation of Heteronuclear Feshbach Molecules from a ${}^{85}$Rb - ${}^{87}$Rb gas
• Microwave potentials and optimal control for robust quantum gates on an atom chip
• Feshbach resonances in ultracold atomic and molecular collisions: threshold behaviour and suppression of poles in scattering lengths
• Novel quantum phases of dipolar Bose gases in optical lattices
• Feshbach resonances in mixtures of ultracold ${}^6$Li and ${}^{87}$Rb gases
• Breaking van der Waals molecules with magnetic fields
• Collective excitations of trapped one-dimensional dipolar quantum gases
• Ultracold Thermalization of ${}^7$Li and ${}^{87}$Rb

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• Anomalous Dimers in Quantum Mixtures near Broad Resonances: Pauli Blocking, Fermi Surface Dynamics and Implications
• Effects of Electric Fields on Heteronuclear Feshbach Resonances in Ultracold ${}^6\mathrm{Li}{-}^{87}\mathrm{Rb}$ Mixtures
• Fermi-Bose Mixtures Near Broad Interspecies Feshbach Resonances
• Quantum Defect Theory description of weakly bound levels and Feshbach resonances in LiRb
• Matter sound waves in two-component Bose-Einstein condensates
• Geometrically Frustrated Coarsening Dynamics in Spinor Bose-Fermi Mixtures
• Near-threshold scaling of resonant inelastic collisions at ultralow temperatures
• Polaronic neutron in dilute alpha matter: A $p$-wave Bose polaron