Quantum-enhanced differential atom interferometers and clocks with spin-squeezing swapping
Year: 2023
Authors: Corgier R., Malitesta M., Smerzi A., Pezzè L.
Autors Affiliation: QSTAR, INO CNR, Largo Enrico Fermi 2, I-50125 Florence, Italy; LENS, Largo Enrico Fermi 2, I-50125 Florence, Italy; Univ PSL, Sorbonne Univ, LNE SYRTE, Observ Paris,CNRS, 61 Ave Observ, F-75014 Paris, France.
Abstract: Thanks to common-mode noise rejection, dif-ferential configurations are crucial for realistic applications of phase and frequency estimation with atom interferometers. Current differential protocols with uncorrelated particles and mode -separable settings reach a sensitivity bounded by the standard quantum limit (SQL). Here we show that differential interferometry can be un-derstood as a distributed multiparameter es-timation problem and can benefit from both mode and particle entanglement. Our protocol uses a single spin-squeezed state that 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 analyt-ical approximations that guide the optimization of the protocol. The scheme is also tested with simulation of noise in atomic clocks and interfer-ometers.
Journal/Review: QUANTUM
Volume: 7 Pages from: arXiv:2205.0969 to: arXiv:2205.0969
More Information: R.C. thanks the Paris Observatory Scientific Council and was funded by PSL fellowship at Paris Observatory program. We acknowledge financial support from the QuantEra project SQUEIS. We also acknowledge financial support from the European Union’s Horizon 2020 research and innovation programme-Qombs Project, FET Flagship on Quantum Technologies Grant No. 820419.KeyWords: Podolsky-rosen Paradox; Entanglement; Sensors; LimitImpactFactor: 5.100Citations: 1data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-06References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here