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Phys Rev Lett. 2002 Mar 4;88(9):093601. Epub 2002 Feb 13.

Polarization squeezing of continuous variable stokes parameters.

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  • 1Department of Physics, Faculty of Science, Australian National University, ACT 0200, Australia.


We report the first direct experimental characterization of continuous variable quantum Stokes parameters. We generate a continuous wave light beam with more than 3 dB of simultaneous squeezing in three of the four Stokes parameters. The polarization squeezed beam is produced by mixing two quadrature squeezed beams on a polarizing beam splitter. Depending on the squeezed quadrature of these two beams the quantum uncertainty volume on the Poincaré sphere becomes a "cigarlike" or "pancakelike" ellipsoid.

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