Toward efficient correction of multiqubit measurement errors: pair correlation method
Michael R Geller, Mingyu Sun
Abstract
Abstract Measurement errors limit the performance of near-term quantum computers and their potential for practical application. However they are partly correctable after a calibration step that requires, for a complete implementation on a register of n qubits, 2 n additional measurements. Here we introduce an approximate but efficient method for multiqubit measurement error characterization and mitigation requiring the classical processing of 2 n × 2 n matrices, but only O (4 k n 2 ) measurements, where k = O (1) is the number of qubits in a correlation volume. We demonstrate and validate the method on an IBM Q processor with registers of 4 and 8 superconducting qubits.
Topics & Concepts
AlgorithmIBMLimit (mathematics)CalibrationComputer scienceQubitCorrelationMathematicsQuantum computerError detection and correctionQuantum error correctionRelation (database)Observational errorQuantumEncoding (memory)Measure (data warehouse)Characterization (materials science)Range (aeronautics)Discrete mathematicsQuantum systemMeasurement uncertaintyQuantum information processingQuantum algorithmPhysicsQuantum Information and CryptographyQuantum and electron transport phenomenaQuantum Computing Algorithms and Architecture