Conversion efficiencies of heteronuclear Feshbach molecules

Observation of Heteronuclear Feshbach Molecules from a 85Rb â•fi 87Rb gas

Ultracold Fermionic Feshbach Molecules

Date J The final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline. This thesis presents experiments creating heteronuclear diatomic molecules from ultracold mixtures of atomic bosons and fermions. The work presented takes advantage of a type of scatt...

p-Wave Feshbach molecules.

We have produced and detected molecules using a p-wave Feshbach resonance between 40K atoms. We have measured the binding energy and lifetime for these molecules and we find that the binding energy scales approximately linearly with the magnetic field near the resonance. The lifetime of bound p-wave molecules is measured to be 1.0+/-0.1 ms and 2.3+/-0.2 ms for the ml=+/-1 and ml=0 angular momen...

Conversion efficiency of ultracold fermionic atoms to bosonic molecules via Feshbach resonance sweep experiments.

We explain why the experimental efficiency observed in the conversion of ultracold Fermi gases of 40K and 6Li atoms into diatomic Bose gases is limited to 0.5 when the Feshbach resonance sweep rate is sufficiently slow to pass adiabatically through the Landau-Zener transition but faster than "the collision rate" in the gas, and increases beyond 0.5 when it is slower. The 0.5 efficiency limit is...

Ultracold Fermionic Feshbach Molecules of NaK

We report on the formation of ultracold fermionic Feshbach molecules of NaK, the first fermionic molecule that is chemically stable in its ground state. The lifetime of the nearly degenerate molecular gas exceeds 100 ms in the vicinity of the Feshbach resonance. The measured dependence of the molecular binding energy on the magnetic field demonstrates the open-channel character of the molecules...