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Stano, P. (author), Klinovaja, J. (author), Braakman, F.R. (author), Vandersypen, L.M.K. (author), Loss, D. (author)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...journal article 2015