that would be intractable by classical computers. However, thousands or millions of qubits
might be required to solve useful problems. High-precision and low-noise electrical signals
are required to manipulate and read the state of a qubit and to control qubit-to-qubit
interactions. Current systems use room temperature electronics with many coax cables
routed to the qubit chip inside a dilution refrigerator. This approach does not scale to large …