Optical Fiber Brings Universal Quantum Computing Closer | Research & Technology | Mar 2021

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GAITHERSBURG, Md., March 25, 2021 — Physicists at the National Institute of Standards and Technology (NIST) measured and controlled a superconducting qubit using optical fiber rather than metal electrical wires. The work paves the way to being able to pack a million qubits into a quantum computer rather than just a few thousand and introduces the possibility of a universal quantum computer capable of solving the most difficult equations. Superconducting circuits are a leading technology for making quantum computers because they are reliable and easily mass produced. But these circuits must operate at cryogenic temperatures, and schemes for wiring them to room-temperature electronics are complex and prone to overheating the qubits. Conventional cryostats — supercold dilution refrigerators — with metal wiring can support only thousands of...