Scalable Solid State Quantum Computing with Limited Control

Recent experiments on solid state qubits have focused on the implementation of high-fidelity operations on two qubits. It may seem that scaling these experiments to say 30 qubits requires a further big step in controlling the qubits. We show that this is not the case: the control implemented today is enough to indirectly control the remaining qubits, which can remain passive. The control we have on the two qubits is mediated by the system Hamiltonian in a scalable way.