Rotational predissociation of extremely weakly bound atom-molecule complexes produced by Feshbach resonance association.

Breaking van der Waals molecules with magnetic fields

Manipulating dynamics of molecules with external fields has long been a sought-after goal of experimental and theoretical research. Several groups have studied elastic and inelastic collisions of ultracold alkali atoms in the presence of Feshbach scattering resonances [1–6]. It was found that the probabilities of elastic collisions and inelastic energy transfer undergo dramatic changes near Fes...

Efficient creation of molecules from a cesium Bose-Einstein condensate

– We report a new scheme to create weakly bound Cs2 molecules from an atomic Bose-Einstein condensate. The method is based on switching the magnetic field to a narrow Feshbach resonance and yields a high atom-molecule conversion efficiency of more than 30%, a factor of three higher than obtained with conventional magnetic-field ramps. The Cs2 molecules are created in a single g-wave rotational ...

Rotational predissociation of (rare gas atom)–(slow rotating diatomic molecule) complexes

Three-boson problem near a narrow Feshbach resonance.

We consider a three-boson system with resonant binary interactions and show that for sufficiently narrow resonances three-body observables depend only on the resonance width and the scattering length. The effect of narrow resonances is qualitatively different from that of wide resonances revealing novel physics of three-body collisions. We calculate the rate of three-body recombination to a wea...

Rotational predissociation of strongly anisotropic van der Waals complexes: The He-CO example.

A very accurate method is applied, within the theoretical framework of the scattering closecoupling equations, to treat rotational predissociation processes in the He-CO van der Waals molecule. The method was already employed successfully to study vibrational predissociation of the HeI2 complexes and shows in the present case significant differences with several approximate methods used to esti...