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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 moves toward a universal quantum computer capable of solving the most difficult equations, which is estimated to require about 1 million qubits.
Superconducting circuits, a leading technology in the creation of quantum computers given their reliability and their ease of mass producibility, must operate at cryogenic temperatures. 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…READ MORE