These "computers" are just experiments in a lab right now. The qubits are prepared and read out by highly specialized equipment that differs depending on the

These "computers" are just experiments in a lab right now. The qubits are prepared and read out by highly specialized equipment that differs depending on the substrate being pursued (e.g., lasers for trapped ions, cryogenic amplifiers for SQUIDs, etc.). To make an analogy with classical computation, imagine wiring the very first transistors together by hand and computing 2+2 using a voltage supply and an oscilloscope.