TY - JOUR
T1 - Broad Feshbach resonance in the ⁶Li-⁴⁰K mixture
AU - Tiecke, T.G.
AU - Goosen, M.R.
AU - Ludewig, A.
AU - Gensemer, S.D.
AU - Kraft, S.
AU - Kokkelmans, S.J.J.M.F.
AU - Walraven, J.T.M.
PY - 2010
Y1 - 2010
N2 - We study the widths of interspecies Feshbach resonances in a mixture of the fermionic quantum gases 6Li and 4°K. 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/4°K mixture. Experimentally, we obtain the asymmetric Fano line shape of the interspecies elastic cross section by measuring the distillation rate of 6Li atoms from a potassium-rich 6Li/4°K mixture as a function of magnetic field. This provides us with the first experimental determination of the width of a resonance in this mixture, ¿B=1.5(5) G. Our results offer good perspectives for the observation of universal crossover physics using this mass-imbalanced fermionic mixture.
AB - We study the widths of interspecies Feshbach resonances in a mixture of the fermionic quantum gases 6Li and 4°K. 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/4°K mixture. Experimentally, we obtain the asymmetric Fano line shape of the interspecies elastic cross section by measuring the distillation rate of 6Li atoms from a potassium-rich 6Li/4°K mixture as a function of magnetic field. This provides us with the first experimental determination of the width of a resonance in this mixture, ¿B=1.5(5) G. Our results offer good perspectives for the observation of universal crossover physics using this mass-imbalanced fermionic mixture.
U2 - 10.1103/PhysRevLett.104.053202
DO - 10.1103/PhysRevLett.104.053202
M3 - Article
C2 - 20366760
SN - 0031-9007
VL - 104
SP - 053202-1/4
JO - Physical Review Letters
JF - Physical Review Letters
IS - 5
M1 - 053202
ER -