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    Smart cable sharing gives quantum computers a big boost

    April 15, 2026, Categories  Physics, Technology/Electronics

    An artist’s rendering of time multiplexing of control signals to a quantum computer.
    The control signals for single-qubit gates (short blocks) and two-qubit gates (long blocks) travel through common cables (tunnels) to switches, which distribute them among the qubits (spheres) based on switching signals (diamonds). By ordering the control signals in a clever way, akin to playing Tetris, traffic jams in the flow of control signals can largely be avoided and programs on the quantum computer can be executed almost as fast as if each qubit had its own cable for control signals.
    Credit: Chalmers University of Technology | Boid

    A major obstacle in the development of powerful quantum computers is the growing number of cables required to control a computer as the number of qubits increases...

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