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Digital zero-noise extrapolation (dZNE) has emerged as a common approach forquantum error mitigation (QEM) due to its conceptual simplicity, accessibility,and resource efficiency. In practice, however, properly applying dZNE to extendthe computational reach of noisy quantum processors is rife with subtleties.Here, based on literature review and original experiments on noisy simulatorsand real quantum hardware, we define best practices for QEM with dZNE for eachstep of the workflow, including noise amplification, execution on the quantumdevice, extrapolation to the zero-noise limit, and composition with other QEMmethods. We anticipate that this effort to establish best practices for dZNEwill be extended to other QEM methods, leading to more reproducible andrigorous calculations on noisy quantum hardware.

Best practices for quantum error mitigation with digital zero-noise extrapolation