10 dB of Spin Squeezing via Measurement -- a Useful Entanglement Resource

ORAL

Abstract

We report results from an experiment to generate and directly observe 10.2(6) dB of spin squeezing using a quantum non-demolition measurement (QND), the most directly observed spin squeezing in an atomic ensemble to date. The squeezing is generated by measuring state populations through an optical cavity on a closed optical transition in an ensemble of $5\ast {10}^{5} \quad^{87}$Rb atoms. Such a scheme can be applied to optical lattice clocks using Sr and Yb.

*This material is based upon work supported by the National Science Foundation under Grant Number 1125844; NSF PFC, DARPA QuASAR, ARO, NIST, NSF GRF, NDSEG, A*STAR

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Authors

  • Kevin Cox

    • JILA, University of Colorado at Boulder

  • Justin Bohnet

    • JILA, University of Colorado at Boulder

  • Matthew Norcia

    • JILA, University of Colorado at Boulder

  • Joshua Weiner

    • JILA, University of Colorado at Boulder

  • Zilong Chen

    • JILA, University of Colorado at Boulder

  • James Thompson

    • JILA, University of Colorado at Boulder