Three-Dimensional Wiring for Extensible Quantum Computing: The Quantum Socket

Reimagining and miniaturizing the huge machines of the World War II era was a great step in the history of computing. Now quantum computers face a similar developmental step, on the way to tomorrow's compact, scalable systems. In analogy with sockets in traditional electronics, the authors present a link for classical control hardware and solid-state qubits, with exceptional properties at microwave frequencies and cryogenic temperatures. This technology should bring us within a few years to a key milestone in quantum computing: quantum error-correction implemented for hundreds of physical qubits.