Retrieval of cavity-generated atomic spin-squeezing after free-space release
Abstract
The compatibility of cavity-generated spin-squeezed atomic states with atom-interferometric sensors that require freely falling atoms is demonstrated. An ensemble of spin-squeezed atoms in a high-finesse optical cavity with near-uniform atom-cavity coupling is prepared, released into free space, recaptured in the cavity, and probed. Up to 10 dB of metrologically-relevant squeezing is retrieved for 700 microsecond free-fall times, and decaying levels of squeezing are realized for up to 3 millisecond free-fall times. The degradation of squeezing results from loss of atom-cavity coupling homogeneity between the initial squeezed state generation and final collective state read-out. A theoretical model is developed to quantify this degradation and this model is experimentally validated.
Keywords
Cite
@article{arxiv.1912.08334,
title = {Retrieval of cavity-generated atomic spin-squeezing after free-space release},
author = {Yunfan Wu and Rajiv Krishnakumar and Julián Martínez-Rincón and Benjamin K. Malia and Onur Hosten and Mark A. Kasevich},
journal= {arXiv preprint arXiv:1912.08334},
year = {2020}
}