Description
Noise is a fundamental barrier to realising practical quantum advantage. While modern quantum hardware has made significant progress in mitigating standard, temporally uncorrelated noise, non-Markovian (NM) noise, typically arising from correlations between a system and its environment over multiple time steps, remains largely unaddressed. Standard benchmarking techniques, such as randomized benchmarking, assume Markovian errors and therefore underestimate error accumulation under repeated gate applications. In this work, we analyse how system-environment correlations influence gate performance and explore the relationship between non-Markovianity and fidelity of a process. Interestingly, we identify regimes where more NM can improve process fidelity. These observations motivate a noise-aware optimisation strategy for gate implementation in non-Markovian environments. Finally, we demonstrate our approach experimentally on the IBM Quantum platform, providing both theoretical insight and practical guidance for implementing high-fidelity gates.
| I am the presenting author | Yes |
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