期刊
QUANTUM SCIENCE AND TECHNOLOGY
卷 6, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2058-9565/abd5c9
关键词
error mitigation; measurement errors; superconducting qubits
Measurement errors on near-term quantum computers can be partially corrected after a calibration step to improve performance. A new efficient method for multiqubit measurement error characterization and mitigation has been introduced, requiring classical processing of matrices and fewer measurements. This method has been demonstrated and validated on IBM Q processor with 4 and 8 superconducting qubits.
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) x 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.
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