Magnetic Control of the Interaction in Ultracold K-Rb Mixtures

by A. Simoni, F. Ferlaino, G. Roati, G. Modugno, M. Inguscio

Abstract:

We predict the presence of several magnetic Feshbach resonances in selected Zeeman sublevels of the isotopic pairs K40−Rb87 and K41−Rb87 at magnetic fields up to 103 G. Positions and widths are determined combining a new measurement of the K40−Rb87 inelastic cross section with recent experimental results on both isotopes. The possibility of driving a K-Rb mixture from the weak to the strong interacting regime tuning the applied field should allow one to achieve the optimal conditions for boson-induced Cooper pairing in a multicomponent K40−Rb87 atomic gas and for the production of ultracold polar molecules.

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Reference:

Magnetic Control of the Interaction in Ultracold K-Rb Mixtures,
A. Simoni, F. Ferlaino, G. Roati, G. Modugno, M. Inguscio,
Phys. Rev. Lett., volume 90, 2003.

Bibtex Entry:

@article{PhysRevLett.90.163202,
  title = {Magnetic Control of the Interaction in Ultracold K-Rb Mixtures},
  author = {Simoni, A. and Ferlaino, F. and Roati, G. and Modugno, G. and Inguscio, M.},
  journal = {Phys. Rev. Lett.},
  volume = {90},
  issue = {16},
  pages = {163202},
  numpages = {4},
  year = {2003},
  month = {Apr},
  abstract = {We predict the presence of several magnetic Feshbach resonances in selected Zeeman sublevels of the isotopic pairs K40−Rb87 and K41−Rb87 at magnetic fields up to 103   G. Positions and widths are determined combining a new measurement of the K40−Rb87 inelastic cross section with recent experimental results on both isotopes. The possibility of driving a K-Rb mixture from the weak to the strong interacting regime tuning the applied field should allow one to achieve the optimal conditions for boson-induced Cooper pairing in a multicomponent K40−Rb87 atomic gas and for the production of ultracold polar molecules.},
  publisher = {American Physical Society},
  doi = {10.1103/PhysRevLett.90.163202},
  url = {http://link.aps.org/doi/10.1103/PhysRevLett.90.163202},
  arXiv = {http://arxiv.org/abs/cond-mat/0301159}
}