Repeated output coupling of ultracold Feshbach molecules from a Cs BEC

Repeated output coupling of ultracold Feshbach molecules from a Cs BEC

Blog Article

We investigate magnetoassociation of ultracold Feshbach molecules from a Bose-Einstein condensate of Cs atoms and explore the spectrum of weakly bound molecular states close to the atomic threshold.By exploiting the variation of magnetic field experienced by a molecular cloud falling in the presence 12n/1200 wella of a magnetic field gradient, we demonstrate the repeated output coupling of molecules from a single atomic cloud using a Feshbach resonance at 19.89 G.Using this method we are able to produce up to 24 separate pulses of molecules from a single atomic condensate, with a molecular pulse created every 7.

2 ms.Furthermore, by careful control of the magnetic bias field and gradient we are able to utilise an avoided crossing in the bound state spectrum at 13.3 G to demonstrate exquisite control over here the dynamics of the molecular clouds.