---
_id: '8319'
abstract:
- lang: eng
  text: 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.
acknowledgement: 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.
article_number: '012224'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Yunfan
  full_name: Wu, Yunfan
  last_name: Wu
- first_name: Rajiv
  full_name: Krishnakumar, Rajiv
  last_name: Krishnakumar
- first_name: Julián
  full_name: Martínez-Rincón, Julián
  last_name: Martínez-Rincón
- first_name: Benjamin K.
  full_name: Malia, Benjamin K.
  last_name: Malia
- first_name: Onur
  full_name: Hosten, Onur
  id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
  last_name: Hosten
  orcid: 0000-0002-2031-204X
- first_name: Mark A.
  full_name: Kasevich, Mark A.
  last_name: Kasevich
citation:
  ama: Wu Y, Krishnakumar R, Martínez-Rincón J, Malia BK, Hosten O, Kasevich MA. Retrieval
    of cavity-generated atomic spin squeezing after free-space release. <i>Physical
    Review A</i>. 2020;102(1). doi:<a href="https://doi.org/10.1103/PhysRevA.102.012224">10.1103/PhysRevA.102.012224</a>
  apa: Wu, Y., Krishnakumar, R., Martínez-Rincón, J., Malia, B. K., Hosten, O., &#38;
    Kasevich, M. A. (2020). Retrieval of cavity-generated atomic spin squeezing after
    free-space release. <i>Physical Review A</i>. American Physical Society. <a href="https://doi.org/10.1103/PhysRevA.102.012224">https://doi.org/10.1103/PhysRevA.102.012224</a>
  chicago: Wu, Yunfan, Rajiv Krishnakumar, Julián Martínez-Rincón, Benjamin K. Malia,
    Onur Hosten, and Mark A. Kasevich. “Retrieval of Cavity-Generated Atomic Spin
    Squeezing after Free-Space Release.” <i>Physical Review A</i>. American Physical
    Society, 2020. <a href="https://doi.org/10.1103/PhysRevA.102.012224">https://doi.org/10.1103/PhysRevA.102.012224</a>.
  ieee: Y. Wu, R. Krishnakumar, J. Martínez-Rincón, B. K. Malia, O. Hosten, and M.
    A. Kasevich, “Retrieval of cavity-generated atomic spin squeezing after free-space
    release,” <i>Physical Review A</i>, vol. 102, no. 1. American Physical Society,
    2020.
  ista: Wu Y, Krishnakumar R, Martínez-Rincón J, Malia BK, Hosten O, Kasevich MA.
    2020. Retrieval of cavity-generated atomic spin squeezing after free-space release.
    Physical Review A. 102(1), 012224.
  mla: Wu, Yunfan, et al. “Retrieval of Cavity-Generated Atomic Spin Squeezing after
    Free-Space Release.” <i>Physical Review A</i>, vol. 102, no. 1, 012224, American
    Physical Society, 2020, doi:<a href="https://doi.org/10.1103/PhysRevA.102.012224">10.1103/PhysRevA.102.012224</a>.
  short: Y. Wu, R. Krishnakumar, J. Martínez-Rincón, B.K. Malia, O. Hosten, M.A. Kasevich,
    Physical Review A 102 (2020).
das_tickbox: '0'
date_created: 2020-08-30T22:01:10Z
date_published: 2020-07-30T00:00:00Z
date_updated: 2026-07-08T08:59:02Z
day: '30'
department:
- _id: OnHo
doi: 10.1103/PhysRevA.102.012224
external_id:
  arxiv:
  - '1912.08334'
  isi:
  - '000555104200011'
intvolume: '       102'
isi: 1
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/1912.08334
month: '07'
oa: 1
oa_version: Preprint
publication: Physical Review A
publication_identifier:
  eissn:
  - 2469-9934
  issn:
  - 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: Retrieval of cavity-generated atomic spin squeezing after free-space release
type: journal_article
user_id: 68b8ca59-c5b3-11ee-8790-cd641c68093d
volume: 102
year: '2020'
...