  Spin-based silicon quantum electronic circuits offer a scalable platform for
quantum computation, combining the manufacturability of semiconductor devices
with the long coherence times afforded by spins in silicon. Advancing from
current few-qubit devices to silicon quantum processors with upwards of a
million qubits, as required for fault-tolerant operation, presents several
unique challenges, one of the most demanding being the ability to deliver
microwave signals for large-scale qubit control. Here we demonstrate a
potential solution to this problem by using a three-dimensional dielectric
resonator to broadcast a global microwave signal across a quantum
nanoelectronic circuit. Critically, this technique utilizes only a single
microwave source and is capable of delivering control signals to millions of
qubits simultaneously. We show that the global field can be used to perform
spin resonance of single electrons confined in a silicon double quantum dot
device, establishing the feasibility of this approach for scalable spin qubit
control.
