Refined Waveguide Quantum Electrodynamic Architecture Spurs Qubit Photon Generation

By connecting superconducting quantum bits to a microwave transmission line, MIT researchers demonstrated how qubits can generate, on demand, photons needed to support communication between quantum processors. The demonstration is a step toward reliably achieving the interconnections that would enable a modular quantum computing system capable of performing at speeds exponentially faster than classical computers. Superconducting qubits are unable to support interactivity beyond that occurring locally, with nearby and neighboring (co-located) qubits. By inserting microwave waveguides to function as the basis for quantum interconnects, quantum information can travel from one location to another. The microwave transmission line, or...