Parasitic-Free Gate: An Error-Protected Cross-Resonance Switch in Weakly Tunable Architectures
Parasitic-Free Gate: An Error-Protected Cross-Resonance Switch in Weakly Tunable Architectures
In two-qubit gates activated by microwave pulses, by turning the pulse on or off, the state of qubits is swapped between entangled or idle modes. In either mode, the presence of stray couplings makes qubits accumulate coherent phase error. However, the error rates in the two modes differ because qubits …