AAWSAP DIRD, Quantum Tomography of Negative Energy States in the Vacuum, January 2011

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Figure S. Wigner Function of a Squeezed Vacuum. Wigner function (top) and quadrature
fluctuations (bottom). This shows the experimentally reconstructed Wigner function of a
significantly squeezed vacuum generated by parametric amplification (Sect. IIB-3). The noise
trace (bottom) shows a part of the experimental data used to reconstruct the depicted Wigner
function via optical homodyne tomography (courtesy of Ulf Leonhardt).
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