Spin-squeezing and Dicke state preparation by heterodyne measurement
Quantum Physics
2011-02-18 v3
Abstract
We investigate the quantum non-demolition (QND) measurement of an atomic population based on a heterodyne detection and show that the induced back-action allows to prepare both spin-squeezed and Dicke states. We use a wavevector formalism to describe the stochastic process of the measurement and the associated atomic evolution. Analytical formulas of the atomic distribution momenta are derived in the weak coupling regime both for short and long time behavior, and they are in good agreement with those obtained by a Monte-Carlo simulation. The experimental implementation of the proposed heterodyne detection scheme is discussed. The role played in the squeezing process by the spontaneous emission is considered.
Keywords
Cite
@article{arxiv.1003.0157,
title = {Spin-squeezing and Dicke state preparation by heterodyne measurement},
author = {Thomas Vanderbruggen and Simon Bernon and Andréa Bertoldi and Arnaud Landragin and Philippe Bouyer},
journal= {arXiv preprint arXiv:1003.0157},
year = {2011}
}