Conditional Spin-Squeezing of a Large Ensemble via the Vacuum Rabi Splitting
Quantum Physics
2012-03-08 v1 Atomic Physics
Abstract
We use the vacuum Rabi splitting to perform quantum nondemolition (QND) measurements that prepare a conditionally spin-squeezed state of a collective atomic psuedo-spin. We infer a 3.4(6) dB improvement in quantum phase estimation relative to the standard quantum limit for a coherent spin state composed of uncorrelated atoms. The measured collective spin is composed of the two-level clock states of nearly 10^6 Rb-87 atoms confined inside a low finesse F = 710 optical cavity. This technique may improve atomic sensor precision and/or bandwidth, and may lead to more precise tests of fundamental physics.
Keywords
Cite
@article{arxiv.1103.0335,
title = {Conditional Spin-Squeezing of a Large Ensemble via the Vacuum Rabi Splitting},
author = {Zilong Chen and Justin G. Bohnet and Shannon R. Sankar and Jiayan Dai and James K. Thompson},
journal= {arXiv preprint arXiv:1103.0335},
year = {2012}
}
Comments
Letter (4 pages, 4 figures) and Supporting Material (3 pages). To appear in Phys. Rev. Lett