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- W4313483325 abstract "Variational quantum algorithms are tailored to perform within the constraints of current quantum devices, yet they are limited by performance-degrading errors. In this study, we consider a noise model that reflects realistic gate errors inherent to variational quantum algorithms. We investigate the decoherence of a variationally prepared quantum state due to this noise model, which causes a deviation from the energy estimation in the variational approach. By performing a perturbative analysis of optimized circuits, we determine the noise threshold at which the criteria set by the stability lemma is met. We assess our findings against the variational quantum approximate optimization algorithm for $3$-SAT problem instances and unstructured search with up to $10$ qubits and $30$ layers. Moreover, we show that certain gate errors have a significantly smaller impact on the coherence of the state, allowing us to reduce the execution time without compromising performance." @default.
- W4313483325 created "2023-01-06" @default.
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- W4313483325 date "2022-12-30" @default.
- W4313483325 modified "2023-09-24" @default.
- W4313483325 title "On the gate-error robustness of variational quantum algorithms" @default.
- W4313483325 doi "https://doi.org/10.48550/arxiv.2301.00048" @default.
- W4313483325 hasPublicationYear "2022" @default.
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