Observing spin-squeezed states under spin-exchange collisions for a second

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...

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Bibliographic Details
Published inarXiv.org
Main Authors Meng-Zi Huang, Jose Alberto de la Paz, Mazzoni, Tommaso, Ott, Konstantin, Rosenbusch, Peter, Sinatra, Alice, Garrido Alzar, Carlos L, Reichel, Jakob
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 10.05.2023
Subjects
Amplification
Atomic clocks
Compressing
Metrology
Particle spin
Physics - Quantum Physics
Quantum nondemolition
Spin dynamics
Squeezed states (quantum theory)
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.2007.01964