Observing Spin-Squeezed States under Spin-Exchange Collisions for a Second

Observing Spin-Squeezed States under Spin-Exchange Collisions for a Second

Blog Article

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 time scales 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 click here 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 30hh bikini a metrologically relevant regime and highlight the importance of spin interactions in real-life applications of spin squeezing.