Compression readout: A high-fidelity method for large-scale quantum state readout

Achieving large-scale quantum computing demands high fidelities for all the quantum operations involved,including state preparation,quantum gates,and quantum measurement.To this goal,several state-of-the-art quantum processors [1,2],with high gate fidelities on superconducting platforms have been built.However,realizing algorithms with practical applications,such as Shor’s algorithm,or quantum machine learning algorithms,requires more sophisticated designs to correct or suppress the errors and boost the outcome accuracy [3].