Rigetti Demonstrates Two-Qubit Gate Fidelities as High as 99.5% on a Test Device

One of the most important measures of qubit quality is the two-qubit gate fidelity. All the quantum hardware providers are working to improve this measure in their next generation devices. Without further improvements, it will be difficult for any company to run any NISQ algorithms that provide accurate answers or meet the required error rate threshold for error correction techniques to actually work. Rigetti Computing is also working on this and announced that they have achieved two-qubit gate fidelities on a 9 qubit test device as high as 99.5% with a median of 99.2%. This level would be competitive with some of the very best quantum processors that we track on our Qubit Quality page. For comparison, Rigetti's has reported that their latest 80 qubit production machine, named Aspen-M-1, is providing two-qubit median fidelities between 92.7%-95.8% depending upon the particular gate type. The next step for Rigetti will be to incorporate the techniques and processes they have developed with this test chip into a future revision of a production device that can maintain this level of gate fidelity on a device that has many more qubits. Additional information is available in a news release provided by Rigetti available here.

February 18, 2022