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Trapped Ion Quantum Computing

Critical metrology of minimally accessible anisotropic spin chains

arXiv
Authors: Marco Adani, Simone Cavazzoni, Berihu Teklu, Paolo Bordone, Matteo G. A. Paris

Year

2024

Paper ID

67090

Status

Preprint

Abstract Read

~2 min

Abstract Words

111

Citations

N/A

Abstract

We address quantum metrology in critical spin chains with anisotropy and Dzyaloshinskii-Moriya (DM) interaction, and show how local and quasi-local measurements may be exploited to characterize global properties of the systems. In particular, we evaluate the classical (magnetization) and quantum Fisher information of the relevant parameters for the density matrix of a single spin and that of a pair of spins ranging from nearest to sixth-nearest neighbors, to the limiting case of very distant spins. Our results allow us to elucidate the role of the different parameters and to individuate the optimal working regimes for the precise characterization of the system, also clarifying the effects of correlations on the estimation precision.

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  • We address quantum metrology in critical spin chains with anisotropy and Dzyaloshinskii-Moriya (DM) interaction, and show how local and quasi-local measurements may be...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2405.20296 [2] arXiv https://arxiv.org/abs/2405.20296 [3] Publisher https://arxiv.org/abs/2405.20296

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