Feshbach resonances in ultracold 85Rb-87Rb and 6Li-87Rb mixtures
arXiv:0807.0417 · doi:10.1103/PhysRevA.78.022710
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 (6)
- 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
- Feshbach resonances in ultracold atomic and molecular collisions: threshold behaviour and suppression of poles in scattering lengths
- Breaking van der Waals molecules with magnetic fields
- Collective excitations of trapped one-dimensional dipolar quantum gases