VANDERBRUGGEN, Thomas; BERNON, Simon; BERTOLDI, Andrea; LANDRAGIN, Arnaud; BOUYER, Philippe

doi:10.1103/PhysRevA.83.013821

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VANDERBRUGGEN, Thomas
laboratoire Charles Fabry de l'Institut d'Optique / Optique atomique

BERNON, Simon
laboratoire Charles Fabry de l'Institut d'Optique / Optique atomique

BERTOLDI, Andrea
laboratoire Charles Fabry de l'Institut d'Optique / Optique atomique

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Physical Review A : Atomic, molecular, and optical physics [1990-2015]. 2011-01-26, vol. 83, p. 013821

American Physical Society

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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.< Réduire

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Spin-squeezing and Dicke state preparation by heterodyne measurement

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