Fast closed-loop optimal control of ultracold atoms in an optical lattice

TL;DR

This paper demonstrates the successful use of closed-loop optimization to accelerate and improve the control of ultracold atoms in optical lattices, achieving faster and higher-quality quantum state transformations.

Contribution

It introduces a method for closed-loop optimal control of ultracold atoms, significantly speeding up processes and enhancing transformation quality compared to traditional adiabatic methods.

Findings

Speeded up loading of ultracold atoms by over three times.

Improved crossing of quantum phase transition with higher fidelity.

Enhanced experimental performance over adiabatic techniques.

Abstract

We present experimental evidence of the successful closed-loop optimization of the dynamics of cold atoms in an optical lattice. We optimize the loading of an ultracold atomic gas minimizing the excitations in an array of one-dimensional tubes (3D-1D crossover) and we perform an optimal crossing of the quantum phase-transition from a Superfluid to a Mott-Insulator in a three-dimensional lattice. In both cases we enhance the experiment performances with respect to those obtained via adiabatic dynamics, effectively speeding up the process by more than a factor three while improving the quality of the desired transformation.