We propose a protocol for transitionless driving of a bound quantum system in its parameter space using repeated measurement-like interactions with an external spectator system. As a consequence of the quantum Zeno effect, the fidelity of the final state preparation is equal to unity in the limit of infinite-rate interactions. For finite-rate interactions, the maximal fidelity is achieved for the driving trajectory having a minimal geometric length and keeping a constant speed with respect to the Provost-Vallee metric in the parameter space. We numerically test the protocol in an interacting multiqubit system, demonstrating its dominance over the method of coherent driving.
@article{arxiv.2211.11451,
title = {Decoherence-assisted quantum driving},
author = {Pavel Cejnar and Pavel Stránský and Jan Střeleček and Felipe Matus},
journal= {arXiv preprint arXiv:2211.11451},
year = {2023}
}
Comments
6 pages, 5 figures, submitted to Physical Review A