Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published July 2020 | Published + Submitted
Journal Article Open

Retrieval of cavity-generated atomic spin squeezing after free-space release


We demonstrate that releasing atoms into free space from an optical lattice does not deteriorate cavity-generated spin squeezing for metrological purposes. In this work, an ensemble of 500000 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 700μs free-fall times, and decaying levels of squeezing are realized for up to 3 ms 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 readout. A theoretical model is developed to quantify this degradation and this model is experimentally validated.

Additional Information

© 2020 American Physical Society. Received 14 December 2019; accepted 15 June 2020; published 30 July 2020. We thank N. Engelsen for comments on the manuscript. This work was supported by the Office of Naval Research, Vannevar Bush Faculty Fellowship, Department of Energy, and Defense Threat Reduction Agency. R.K. was partly supported by the AQT/INQNET program at Caltech.

Attached Files

Submitted - 1912.08334.pdf

Published - PhysRevA.102.012224.pdf


Files (2.4 MB)
Name Size Download all
706.4 kB Preview Download
1.7 MB Preview Download

Additional details

August 19, 2023
August 19, 2023