Accurate control of a Bose-Einstein condensate by managing the atomic interaction

TL;DR

This paper demonstrates precise manipulation of ultra-cold atoms in a driven lattice by controlling atomic interactions, enabling targeted localization and transport control, with analysis based on nonlinear Floquet states and Landau-Zener tunneling.

Contribution

It introduces a novel method for controlling atomic localization in a driven lattice through interaction variation and symmetry breaking, advancing quantum control techniques.

Findings

Controlled atomic gathering via symmetry breaking.

Observation and manipulation of Landau-Zener tunneling.

Analysis of transport in disordered systems.

Abstract

We exploit the variation of the atomic interaction in order to move ultra-cold atoms across an AC-driven periodic lattice. By breaking relevant symmetries, a gathering of atoms is achieved. Accurate control of the gathered atoms positions can be demonstrated via the control of the atomic localization process. The localization process is analyzed with the help of the nonlinear Floquet states where the Landau-Zener tunneling between states is observed and controlled. Transport effects in the presence of disorder are discussed.