Three-dimensional Quantum Polarization Tomography of Macroscopic Bell   States
  The polarization properties of macroscopic Bell states are characterized using three-dimensional quantum polarization tomography. This method utilizes three-dimensional inverse Radon transform to reconstruct the polarization quasiprobability distribution function of a state from the probability distributions measured for various Stokes observables. The reconstructed 3D distributions obtained for the macroscopic Bell states are compared with those obtained for a coherent state with the same mean photon number. The results demonstrate squeezing in one or more Stokes observables. 
Bhaskar Kanseri, Timur Iskhakov, Ivan Agafonov, Maria Chekhova, and   Gerd Leuchs
quant-ph