Theoretical framework shows Rydberg atoms in SU(1,1) interferometer enable vector polarimetry of RF fields with sensitivity surpassing SQL over wide angles and reaching below 10^{-6} degrees optimally.
Holevo cram\’{e}r-rao bound for multi-parameter estimation in nonlinear inter- ferometers.arXiv preprint arXiv:2502.02855, 2025
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Standard-quantum-limit-surpassing vector polarimetry using Rydberg atoms in an SU(1,1) interferometer
Theoretical framework shows Rydberg atoms in SU(1,1) interferometer enable vector polarimetry of RF fields with sensitivity surpassing SQL over wide angles and reaching below 10^{-6} degrees optimally.