Physics – Quantum Physics
Scientific paper
2004-06-21
Phys. Rev. A Vol. 70, 052324 (2004)
Physics
Quantum Physics
12 pages, 5 figures
Scientific paper
10.1103/PhysRevA.70.052324
We consider an ensemble of trapped atoms interacting with a continuous wave laser field. For sufficiently polarized atoms and for a polarized light field, we may approximate the non-classical components of the collective spin angular momentum operator for the atoms and the Stokes vectors of the field by effective position and momentum variables for which we assume a gaussian state. Within this approximation, we present a theory for the squeezing of the atomic spin by polarization rotation measurements on the probe light. We derive analytical expressions for the squeezing with and without inclusion of the noise effects introduced by atomic decay and by photon absorption. The theory is readily adapted to the case of inhomogeneous light-atom coupling [A. Kuzmich and T.A.B. Kennedy, Phys. Rev. Lett. Vol. 92, 030407 (2004)]. As a special case, we show how to formulate the theory for an optically thick sample by slicing the gas into pieces each having only small photon absorption probability. Our analysis of a realistic probing and measurement scheme shows that it is the maximally squeezed component of the atomic gas that determines the accuracy of the measurement.
Madsen Lars Bojer
Mølmer Klaus
No associations
LandOfFree
Spin squeezing and precision probing with light and samples of atoms in the gaussian approximation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spin squeezing and precision probing with light and samples of atoms in the gaussian approximation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin squeezing and precision probing with light and samples of atoms in the gaussian approximation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-57690