Degaussification of twin-beam and nonlocality in the phase space

Stefano Olivares, Matteo G. A. Paris

Published 2004-06-04Version 1

We show that inconclusive photon subtraction (IPS) on twin-beam produces non-Gaussian states that violate Bell's inequality in the phase-space. The violation is larger than for the twin-beam itself irrespective of the IPS quantum efficiency. The explicit expression of IPS map is given both for the density matrix and the Wigner function representations.