Abstract
We investigate polarization squeezing in squeezed coherent states with varying coherent amplitudes. In contrast to the traditional characterization based on the full Stokes parameters, we experimentally determine the Stokes vector of each excitation manifold separately. Only for states with a fixed photon number do the methods coincide; when the photon number is indefinite, our approach gives a richer and deeper description. By capitalising on the properties of the Husimi Q function, we map this notion onto the Poincare space, providing a full account of the measured squeezing.
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