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Published May 1, 2007 | public
Journal Article Open

Scattering of polarized laser light by an atomic gas in free space: A quantum stochastic differential equation approach


We propose a model, based on a quantum stochastic differential equation (QSDE), to describe the scattering of polarized laser light by an atomic gas. The gauge terms in the QSDE account for the direct scattering of the laser light into different field channels. Once the model has been set, we can rigorously derive quantum filtering equations for balanced polarimetry and homodyne detection experiments, study the statistics of output processes, and investigate a strong driving, weak coupling limit.

Additional Information

©2007 The American Physical Society (Received 30 January 2007; published 23 May 2007) One of the authors (L.B.) thanks Mike Armen, Ramon van Handel, and Tony Miller for stimulating discussions. One of the authors (L.B.) Is supported by the ARO under Grant No. W911NF-06-1-0378. Two of the authors (H.M. and J.S.) Are supported by the ONR under Grant No. N00014-05-1-0420. Two of the authors (h.M. and G.S.) are supported by the NSF under Grant No. CCF-0323542.


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