Optimal transport of ultracold atoms in the non-adiabatic regimeA. Couvert1, T. Kawalec1, G. Reinaudi1 and D. Guéry-Odelin1, 2
1 Laboratoire Kastler Brossel, CNRS UMR 8852, Ecole Normale Supérieure - 24 rue Lhomond, 75005 Paris, France, EU
2 Laboratoire Collisions Agrégats Réactivité, CNRS UMR 5589, IRSAMC, Université Paul Sabatier 118 Route de Narbonne, 31062 Toulouse CEDEX 4, France, EU
received 16 April 2008; accepted in final form 16 May 2008; published July 2008
published online 11 June 2008
We report the transport of ultracold atoms with optical tweezers in the non-adiabatic regime, i.e. on a time scale on the order of the oscillation period. We have found a set of discrete transport durations for which the transport is not accompanied by any excitation of the centre of mass of the cloud after the transport. We show that the residual amplitude of oscillation of the dipole mode is given by the Fourier transform of the velocity profile imposed to the trap for the transport. This formalism leads to a simple interpretation of our data and simple methods for optimizing trapped particles displacement in the non-adiabatic regime.
37.10.Vz - Mechanical effects of light on atoms, molecules, and ions.
37.10.Gh - Atom traps and guides.
37.90.+j - Other topics in mechanical control of atoms, molecules, and ions.
© EPLA 2008