Broad Feshbach resonance in the 6Li-40K mixture
Abstract
We study the widths of interspecies Feshbach resonances in a mixture of the fermionic quantum gases 6Li and 40K. We develop a model to calculate the width and position of all available Feshbach resonances for a system. Using the model we select the optimal resonance to study the 6Li/40K mixture. Experimentally, we obtain the asymmetric Fano lineshape of the interspecies elastic cross section by measuring the distillation rate of 6Li atoms from a potassium-rich 6Li/40K mixture as a function of magnetic field. This provides us with the first experimental determination of the width of a resonance in this mixture, Delta B=1.5(5) G. Our results offer good perspectives for the observation of universal crossover physics using this mass-imbalanced fermionic mixture.
Keywords
Cite
@article{arxiv.0908.2071,
title = {Broad Feshbach resonance in the 6Li-40K mixture},
author = {T. G. Tiecke and M. R. Goosen and A. Ludewig and S. D. Gensemer and S. Kraft and S. J. J. M. F. Kokkelmans and J. T. M. Walraven},
journal= {arXiv preprint arXiv:0908.2071},
year = {2010}
}
Comments
4 pages, 2 figures