Spatial adiabatic passage via interaction-induced band separation

TL;DR

This paper introduces a method to control interacting particles in quantum systems using interaction-induced band separation, enabling high-fidelity spatial adiabatic passage for atomic states.

Contribution

It demonstrates a novel approach to simplify control of many-particle quantum states by exploiting energy band separation caused by interactions.

Findings

Isolated energy bands can be engineered in interacting systems.

Spatial adiabatic passage can be extended to many-particle regimes.

High-fidelity control of atomic states is achievable using this method.

Abstract

The development of advanced quantum technologies and the quest for a deeper understanding of many-particle quantum mechanics requires control over the quantum state of interacting particles to a high degree of fidelity. However, the quickly increasing density of the spectrum, together with the appearance of crossings in time-dependent processes, makes any effort to control the system hard and resource intensive. Here we show that in trapped systems regimes can exist, in which isolated energy bands appear that allow to easily generalize known single-particle techniques. We demonstrate this for the well-known spatial adiabatic passage effect, which can control the center-of-mass state of atoms with high fidelity.