Cavity-aided non-demolition measurements for atom counting and spin squeezing
Abstract
Probing the collective spin state of an ensemble of atoms may provide a means to reduce heating via the photon recoil associated with the measurement and provide a robust, scalable route for preparing highly entangled states with spectroscopic sensitivity below the standard quantum limit for coherent spin states. The collective probing relies on obtaining a very large optical depth that can be effectively increased by placing the ensemble within an optical cavity such that the probe light passes many times through the ensemble. Here we provide expressions for measurement resolution and spectroscopic enhancement in such cavity-aided non-demolition measurements as a function of cavity detuning. In particular, fundamental limits on spectroscopic enhancements in Rb are considered.
Cite
@article{arxiv.1211.0723,
title = {Cavity-aided non-demolition measurements for atom counting and spin squeezing},
author = {Zilong Chen and Justin G. Bohnet and Joshua M. Weiner and Kevin C. Cox and James K. Thompson},
journal= {arXiv preprint arXiv:1211.0723},
year = {2014}
}
Comments
Substantially shortened. 19 pages, 16 figures