We investigate the possibility to perform a Quantum Non Demolition measurement of the collective alignment of an atomic ensemble in the case of a F≥1 spin. We compare the case of purely vectorial and purely tensorial Hamiltonians and show how to achieve conditional squeezing or entanglement of atomic alignment components.
@article{arxiv.0705.3571,
title = {Conditionnal squeezing of an atomic alignement},
author = {J. Cviklinski and A. Dantan and J. Ortalo and M. Pinard},
journal= {arXiv preprint arXiv:0705.3571},
year = {2012}
}