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Trapped Ion Quantum Computing

Quantum-limited estimation of the difference between photonic momenta via spatially resolved two-photon interference

arXiv
Authors: Luca Maggio, Vincenzo Tamma

Year

2026

Paper ID

28591

Status

Preprint

Abstract Read

~2 min

Abstract Words

88

Citations

N/A

Abstract

We present a quantum sensing protocol for three-dimensional estimation of the difference between the momenta of two photons based on spatially resolved interferometric sampling measurements. The protocol attains ultimate quantum precision in the simultaneous estimation of the components of the relative momentum for any values of the parameters already with sim 2000 sampling measurements and a bias below 1\%. These results identify 3D spatially resolved two-photon interference as an efficient tool for multi-parameter quantum sensing, with potential applications in high-precision 3D localization, refractometry, and near-field calibration in free-space quantum technologies.

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  • This paper contributes to the Trapped-Ion Quantum Computing research area in the Quantum Articles archive.
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  • We present a quantum sensing protocol for three-dimensional estimation of the difference between the momenta of two photons based on spatially resolved interferometric sampling...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2603.08602 [2] arXiv https://arxiv.org/abs/2603.08602 [3] Publisher https://arxiv.org/abs/2603.08602

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