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IonQ claims it has built the most powerful quantum computer yet

Trapped-ion quantum computing startup IonQ today announced the launch of its latest quantum computer, which features what IonQ calls “32 perfect qubits with low gate errors.”
Using IBM’s preferred quantum benchmark, IonQ expects to hit a quantum volume of 4,000,000. That’s a massive increase over the double-digit quantum volume numbers that IBM itself recently announced and it’s a pretty extraordinary claim on IonQ’s side as this would make its system the most powerful quantum computer yet.
The (well-funded) company has never used this metric before. Through a spokesperson, IonQ also noted that it doesn’t necessarily think quantum volume is the best metric, but since the rest of the industry is using it, it decided to release this number. The company argues that its ability to achieve 99.9% fidelity between qubits has allowed it to achieve this breakthrough.
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