Quantum computing: Superconducting ‘fluxonium’ is the longest lasting qubit ever

Fluxonium qubits could make quantum computers more useful

Bartlomiej K. Wroblewski/Alamy

A superconducting qubit, or quantum bit, has broken the record for how long it can maintain its quantum properties. Extending this time will make future quantum computers more useful.

The first step in building a quantum computer is choosing how to make its key ingredients, called qubits. One popular choice, championed by research labs and industry players such as IBM and Google, is the transmon superconducting qubit. But like all qubits, these can become ineffective at storing and processing information after a …


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