In the quest for large-scale quantum computing, networked quantum computers offer a natural path towards scalability. Now that nearest neighbor entanglement has been demonstrated for electron spin qubits in semiconductors, on-chip long distance entanglement brings versatility to connect quantum core units. Here we realize the controlled and coherent transfer of a pair of entangled electron spins, and demonstrate their remote entanglement when separated by a distance of 6 microns. Driven by coherent spin rotations induced by the electron displacement, high-contrast spin quantum interferences are observed and are a signature of the preservation of the entanglement all along the displacement procedure. This work opens the route towards fast on-chip deterministic interconnection of remote quantum bits in semiconductor quantum circuits.
@article{arxiv.2004.02727,
title = {Distant spin entanglement via fast and coherent electron shuttling},
author = {Baptiste Jadot and Pierre-André Mortemousque and Emmanuel Chanrion and Vivien Thiney and Arne Ludwig and Andreas D. Wieck and Matias Urdampilleta and Christopher Bäuerle and Tristan Meunier},
journal= {arXiv preprint arXiv:2004.02727},
year = {2021}
}
Comments
Main text of 7 pages with 4 figures. Supplementary information of 4 pages with 3 figures