Realising high fidelity entangled states in controlled quantum many-body systems is challenging due to experimental uncertainty in a large number of physical quantities. We develop a robust optimal control method for achieving this goal in finite-size multi-qubit systems despite significant uncertainty in multiple parameters. We demonstrate its effectiveness in the generation of the Greenberger-Horne-Zeilinger state on a star graph of capacitively coupled transmons, and discuss its crucial role for achieving the Heisenberg limit of precision in quantum sensing.
@article{arxiv.2110.12560,
title = {Robust optimal control of interacting multi-qubit systems for quantum sensing},
author = {Nguyen H. Le and Max Cykiert and Eran Ginossar},
journal= {arXiv preprint arXiv:2110.12560},
year = {2021}
}