Researchers working on the QSOLID project have performed two fundamental quantum operations in 6.8 nanoseconds each, with measured accuracies of 99.981% and 99.989%, according to a report published on 27 October 2026. The work, published in Nature Communications, addresses a long-standing tension in quantum computing: faster operations usually need stronger control pulses, which raise the risk of errors.

The method was tested on a single superconducting transmon qubit made at the Helmholtz Nano Facility at Forschungszentrum Jülich. It cuts the chance of unwanted multiphoton transitions, where the qubit jumps to a higher energy state it should not occupy, by a factor of more than 20 compared with the previous standard method. The chance of such a jump stayed below 0.002% per operation.

Why speed and accuracy both matter

Superconducting quantum computers often need several tens of nanoseconds for a similar operation, so a 6.8-nanosecond operation is a substantial step faster. Accuracy matters just as much, because errors that persist across steps degrade quantum error correction, the process needed to make larger machines reliable. Showing that extreme speed and high precision can be achieved together is therefore useful even before the method is scaled up.

That scaling is the main caveat. So far the technique has only been demonstrated on one isolated qubit. Further experiments are needed to test whether it works as well in larger processors and in operations involving two qubits. The result is best read as a benchmark for single-qubit control, not as a working large-scale quantum computer.

Sources: Phys.org and Quantum Zeitgeist.