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Article Dans Une Revue Quantum Année : 2023

Spin-squeezing swapping for differential measurements with atom interferometers and clocks

Marco Malitesta
  • Fonction : Auteur
Augusto Smerzi
  • Fonction : Auteur
Luca Pezzè
  • Fonction : Auteur

Résumé

Thanks to common-mode noise rejection, differential configurations are crucial for realistic applications of phase and frequency estimation with atom interferometers. Differential interferometry can be understood as a distributed multiparameter estimation problem and can benefit from both mode and particle entanglement. Currently, differential protocols with uncorrelated particles and mode-separable settings reach a sensitivity bounded by the standard quantum limit (SQL). Here, we propose to overcome the SQL by exploiting spin-squeezing in an atomic quantum network. A single spin-squeezed state is mode-swapped among common interferometric modes. The mode swapping is optimized to estimate the differential phase shift with sub-SQL sensitivity. Numerical calculations are supported by analytical approximations that guide the optimization of the protocol. The scheme is also tested with simulation of noise in atomic clocks and interferometers.

Dates et versions

hal-03687618 , version 1 (03-06-2022)

Identifiants

Citer

Robin Corgier, Marco Malitesta, Augusto Smerzi, Luca Pezzè. Spin-squeezing swapping for differential measurements with atom interferometers and clocks. Quantum, 2023, 7, pp.965. ⟨10.22331/q-2023-03-30-965⟩. ⟨hal-03687618⟩
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