In early quantum setups, researchers used "room-sized" racks of general-purpose laboratory equipment (oscilloscopes, signal generators) to control a few qubits. However, this approach doesn't scale. If you want to control a 1,000-qubit processor, you cannot have 1,000 room-sized racks of equipment. Modern quantum controllers are solving this through:
As we move from laboratory experiments to commercial-grade quantum advantage, the quantum controller has emerged as the most critical piece of the infrastructure puzzle. What is a Quantum Controller? quantum controller
To understand the complexity of a controller, we have to look at the "lifecycle" of a quantum gate operation: 1. Pulse Generation and Shaping In early quantum setups, researchers used "room-sized" racks