Feshbach spectroscopy of a K-Rb atomic mixture

by F. Ferlaino, C. D’Errico, G. Roati, M. Zaccanti, M. Inguscio, G. Modugno, A. Simoni
Abstract:
We perform extensive magnetic Feshbach spectroscopy of an ultracold mixture of fermionic K40 and bosonic Rb87 atoms. The magnetic-field locations of 13 interspecies resonances are used to construct a quantum collision model able to predict accurate collisional parameters for all K−Rb isotopic pairs. In particular, we determine the interspecies s-wave singlet and triplet scattering lengths for the K40−Rb87 mixture as (−108±3)a0 and (−205±5)a0, respectively. We also predict accurate scattering lengths and the position of Feshbach resonances for the other K−Rb isotopic pairs. We discuss the consequences of our results for current and future experiments with ultracold K−Rb mixtures.
Reference:
Feshbach spectroscopy of a K-Rb atomic mixture,
F. Ferlaino, C. D’Errico, G. Roati, M. Zaccanti, M. Inguscio, G. Modugno, A. Simoni,
Phys. Rev. A, volume 73, 2006.
Bibtex Entry:
@article{PhysRevA.73.040702,
  title = {Feshbach spectroscopy of a K-Rb atomic mixture},
  author = {Ferlaino, F. and D'Errico, C. and Roati, G. and Zaccanti, M. and Inguscio, M. and Modugno, G. and Simoni, A.},
  journal = {Phys. Rev. A},
  volume = {73},
  issue = {4},
  pages = {040702},
  numpages = {4},
  year = {2006},
  month = {Apr},
  abstract = {We perform extensive magnetic Feshbach spectroscopy of an ultracold mixture of fermionic K40 and bosonic Rb87 atoms. The magnetic-field locations of 13 interspecies resonances are used to construct a quantum collision model able to predict accurate collisional parameters for all K−Rb isotopic pairs. In particular, we determine the interspecies s-wave singlet and triplet scattering lengths for the K40−Rb87 mixture as (−108±3)a0 and (−205±5)a0, respectively. We also predict accurate scattering lengths and the position of Feshbach resonances for the other K−Rb isotopic pairs. We discuss the consequences of our results for current and future experiments with ultracold K−Rb mixtures.},
  publisher = {American Physical Society},
  doi = {10.1103/PhysRevA.73.040702},
  url = {http://link.aps.org/doi/10.1103/PhysRevA.73.040702},
  arXiv = {http://arxiv.org/abs/cond-mat/0510630}
}