Oxford physicists push qubit precision to new heights
Breakthrough may shrink future quantum computers and cut costs.
Oxford University physicists have achieved a world-first in quantum computing by setting a new record for single-qubit operation accuracy.
Using a trapped calcium ion as the qubit, the researchers controlled its state using electronic microwave signals instead of lasers.
Their experiment produced an error rate of just 0.000015 percent, or one mistake in 6.7 million operations, nearly ten times better than the previous benchmark set by the same team. The breakthrough brings quantum computers a step closer to becoming viable tools.
This more stable and cost-effective approach was conducted at room temperature and without magnetic shielding, simplifying future hardware requirements.
The precision reduces the number of qubits needed for error correction, making future quantum machines potentially smaller and faster.
Despite the milestone, the researchers emphasised the need to improve two-qubit gate fidelity, where error rates remain significantly higher.
The project is part of the UK Quantum Computing and Simulation Hub, with wider support from the National Quantum Technologies Programme.
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