  The advancement of scalable quantum information processing relies on the
accurate and parallel manipulation of a vast number of qubits, potentially
reaching into the millions. Superconducting qubits, traditionally controlled
through individual circuitry, currently face a formidable scalability challenge
due to the excessive use of wires. This challenge is nearing a critical point
where it might soon surpass the capacities of on-chip routing, I/O packaging,
testing platforms, and economically feasible solutions. Here we introduce a
multiplexed control scheme that efficiently utilizes shared control lines for
operating multiple qubits and couplers. By integrating quantum
hardware-software co-design, our approach utilizes advanced techniques like
frequency multiplexing and individual tuning. This enables simultaneous and
independent execution of single- and two-qubit gates with significantly
simplified wiring. This scheme has the potential to diminish the number of
control lines by one to two orders of magnitude in the near future, thereby
substantially enhancing the scalability of superconducting quantum processors.
