Observing spin-squeezed states under spin-exchange collisions for a second
Abstract
Using the platform of a trapped-atom clock on a chip, we observe the time evolution of spin-squeezed hyperfine clock states in ultracold rubidium atoms on previously inaccessible timescales up to 1 s. The spin degree-of-freedom remains squeezed after 0.6 s, which is consistent with the limit imposed by particle loss and is compatible with typical Ramsey times in state-of-the-art microwave clocks. The results also reveal a surprising spin-exchange interaction effect that amplifies the cavity-based spin measurement via a correlation between spin and external degrees of freedom. These results open up perspectives for squeezing-enhanced atomic clocks in a metrologically relevant regime and highlight the importance of spin interactions in real-life applications of spin squeezing.
Cite
@article{arxiv.2007.01964,
title = {Observing spin-squeezed states under spin-exchange collisions for a second},
author = {Meng-Zi Huang and Jose Alberto de la Paz and Tommaso Mazzoni and Konstantin Ott and Peter Rosenbusch and Alice Sinatra and Carlos L. Garrido Alzar and Jakob Reichel},
journal= {arXiv preprint arXiv:2007.01964},
year = {2023}
}
Comments
12 pages, 6 figures