The ability to manipulate coherently individual quantum objects organized in arrays is a prerequisite to any scalable quantum information platform. For electron spin qubits, it requires the fine tuning of large arrays of tunnel-coupled quantum dots. The cumulated efforts in linear dot arrays have permitted the recent realization of quantum simulators and multi-electron spin coherent manipulation. However, the two-dimensional scaling of such implementations remains undemonstrated while being compulsory to resolve complex quantum matter problems or process quantum information. Here, we demonstrate the two-dimensional coherent control of individual electron spins in a 3x3 array of tunnel-coupled quantum dots. More specifically, we focus on several key quantum functionalities of such control: charge deterministic displacement, local spin readout, local coherent exchange manipulation between two electron spins trapped in adjacent dots, and coherent multi-directional spin shuttling over distances of several microns. This work lays the foundations for exploiting a two-dimensional array of electron spins for quantum simulation and information processing.
@article{arxiv.1808.06180,
title = {Coherent control of individual electron spins in a two dimensional array of quantum dots},
author = {Pierre-Andre Mortemousque and Emmanuel Chanrion and Baptiste Jadot and Hanno Flentje and Arne Ludwig and Andreas D. Wieck and Matias Urdampilleta and Christopher Bauerle and Tristan Meunier},
journal= {arXiv preprint arXiv:1808.06180},
year = {2018}
}