Superconducting qubit ditches magnetic field for speed in a Quantum breakthrough

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Superconducting qubit ditches magnetic field for speed in a Quantum breakthrough
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Researchers have created the first superconducting flux qubit that functions without magnetic fields, advancing quantum computers.

Japan ese researchers have developed the world’s first superconducting flux qubit that functions in a zero magnetic field .

A team led by researchers from Japan’s National Institute of Information and Communications Technology and Tohoku University claims the new π-junction qubit has the longest lifetime among its type, and future improvements could make it key to high-performance quantum computers. Due to their low anharmonicity, transmon qubits—which are frequently seen in modern quantum computers—can result in problems like frequency crowding when numerous qubits are added.

To address this, Tohoku University researchers used a ferromagnetic Josephson junction to create a π-junction. Without requiring external magnetic forces, this π-junction produces a 180-degree phase shift, enabling the qubit to function at its best independently.

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