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Quantum Simulation

Optimal phase estimation in the presence of correlated dephasing

arXiv
Authors: Srijon Ghosh, Arkadiusz Kobus, Stanisław Kurdziałek, Rafał Demkowicz-Dobrzański

Year

2025

Paper ID

17380

Status

Preprint

Abstract Read

~2 min

Abstract Words

85

Citations

N/A

Abstract

We investigate optimal metrological protocols for phase estimation in the presence of correlated dephasing noise, including spin-squeezed states sensing strategies as well as parallel and adaptive protocols optimized using tensor-network based numerical methods. The results are benchmarked against fundamental bounds obtained either via a latest quantum comb extension method or an optimized classical simulation method. We find that the spin-squeezed offer practically optimal performance in the regime where phase fluctuations are positively correlated, but can be outperformed by tensor-network optimized strategies for negatively correlated fluctuations.

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  • We investigate optimal metrological protocols for phase estimation in the presence of correlated dephasing noise, including spin-squeezed states sensing strategies as well as...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2511.07211 [2] arXiv https://arxiv.org/abs/2511.07211 [3] Publisher https://arxiv.org/abs/2511.07211

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