QEngine: An open-source C++ Library for Quantum Optimal Control of Ultracold Atoms

Jens Jakob Sørensen; Jesper Jensen; Till Heinzel; Jacob Sherson

doi:10.1016/j.cpc.2019.04.020

paper

QEngine: An open-source C++ Library for Quantum Optimal Control of Ultracold Atoms

arXiv:1807.11731 · doi:10.1016/j.cpc.2019.04.020

Abstract

We present the first version of the QEngine, an open-source C++ library for simulating and controlling ultracold quantum systems using optimal control theory (OCT). The most notable systems presented here are Bose-Einstein condensates, many-body systems described by Bose-Hubbard type models, and two interacting particles. These systems can all be realized experimentally using ultracold atoms in various trapping geometries including optical lattices. In addition we provide a number of optimal control algorithms including the recently introduced GROUP method. The QEngine library has a strong focus on accessibility and performance. We provide several examples of how to prepare simulations of the physical systems and apply optimal control.