IBM has achieved a Quantum Volume of 512 on their quantum processor codenamed Prague. This uses a circuit of 9 qubits that is 9 levels deep. IBM had previously announced in April that this Prague processor had achieved a Quantum Volume of 256 and they have further optimized it to achieve the higher number. The processor uses a new architecture that IBM calls Falcon R10 that will be the basis of some of the new chips, such as the future Heron processor, announced in their roadmap update earlier this month. The architecture provides higher gate fidelity and lower crosstalk. You can see additional information including detailed data on each of the qubits in the circuit in a Tweet posted by Jay Gambetta here.
May 25, 2022