Optimal transport of ultracold atoms in the non-adiabatic regime

TL;DR

This paper demonstrates optimal transport of ultracold atoms using optical tweezers in the non-adiabatic regime, identifying discrete durations that prevent excitation and providing a Fourier-based framework for optimization.

Contribution

It introduces a Fourier transform-based method to optimize non-adiabatic transport of ultracold atoms, revealing discrete transport durations with minimal excitation.

Findings

Discrete transport durations prevent excitation.

Residual oscillation amplitude relates to the Fourier transform of the velocity profile.

The formalism simplifies optimization of atom transport in the non-adiabatic regime.

Abstract

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. 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.