Print Email Facebook Twitter Fast long-distance control of spin qubits by photon-assisted cotunneling Title Fast long-distance control of spin qubits by photon-assisted cotunneling Author Stano, P. Klinovaja, J. Braakman, F.R. Vandersypen, L.M.K. Loss, D. Faculty Applied Sciences Department Biomechanical Engineering Date 2015-08-04 Abstract We investigate theoretically the long-distance coupling and spin exchange in an array of quantum dot spin qubits in the presence of microwaves. We find that photon-assisted cotunneling is boosted at resonances between photon and energies of virtually occupied excited states and show how to make it spin selective. We identify configurations that enable fast switching and spin echo sequences for efficient and nonlocal manipulation of spin qubits. We devise configurations in which the near-resonantly boosted cotunneling provides nonlocal coupling which, up to certain limit, does not diminish with distance between the manipulated dots before it decays weakly with inverse distance. To reference this document use: http://resolver.tudelft.nl/uuid:6af6054b-1634-4672-8606-5b3cef87b53e Publisher American Physical Society ISSN 1098-0121 Source https://doi.org/10.1103/PhysRevB.92.075302 Source Physical Review B, 92 (7), 2015 Part of collection Institutional Repository Document type journal article Rights © 2015 American Physical Society Files PDF 322892.pdf 414.18 KB Close viewer /islandora/object/uuid:6af6054b-1634-4672-8606-5b3cef87b53e/datastream/OBJ/view