High-fidelity rapid ground-state loading of an ultracold gas into an optical lattice

TL;DR

This paper introduces a fast, high-fidelity method for loading ultracold gases into optical lattices, enabling rapid state preparation without residual excitations by using a specially designed driving potential.

Contribution

The authors develop a fast forward technique to derive a driving potential that achieves rapid ground-state loading of Bose-Einstein condensates into optical lattices, avoiding adiabatic limitations.

Findings

Successful derivation of a fast forward driving potential.

Proposed a feasible bichromatic lattice scheme for experimental implementation.

Achieved high-fidelity ground state loading in short times.

Abstract

A protocol is proposed for the rapid coherent loading of a Bose-Einstein condensate into the ground state of an optical lattice, without residual excitation associated with the breakdown of adiabaticity. The driving potential required to assist the rapid loading is derived using the fast forward technique, and generates the ground state in any desired short time. We propose an experimentally feasible loading scheme using a bichromatic lattice potential, which approximates the fast-forward driving potential with high fidelity.