Broad Feshbach resonance in the 6Li-40K mixture
| Autor: | Tiecke, T. G., Goosen, M. R., Ludewig, A., Gensemer, S. D., Kraft, S., Kokkelmans, S. J. J. M. F., Walraven, J. T. M. |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 104, 053202 (2010) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.104.053202 |
| Popis: | 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. Comment: 4 pages, 2 figures |
| Databáze: | arXiv |
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