How to Build a Quantum Computer: Advanced Fabrication of Superconducting Qubits

The next important milestone for quantum computing is moving past quantum supremacy, which demonstrated computational power, to quantum utility - solving useful computations much faster than classical computers. To accomplish this, quantum computers must scale up to large size, and most importantly, qubit quality must improve to lower errors to the 10^-3 to 10^-4 range. For superconducting qubits, I discuss here our strategy to use 300 mm semiconductor fabrication technology to improve the various interfaces and make wafer-scale systems. I will also describe our plan to scale up to 1M qubits using wafer-scale subsystems including ideas on how to integrate and thus miniaturize the readout system.