Measurement errors can reduce the reliability of quantum sampling tasks, including random circuit sampling and measurement-based quantum computation. The researchers developed a repetition-based scheme that copies each data qubit across multiple physical qubits before readout and uses the majority result.

Using experimental noise profiles from leading superconducting platforms, they found that the method converted individual physical errors into a higher-order process. The error suppression remained exponential even when the encoding operations themselves had realistic imperfections, while requiring a modest linear qubit overhead.