Abstract

A measure of non-Gaussian entanglement in continuous variable (CV) systems based on the volume of the negative part of the Wigner function is proposed. We analyze comparatively this quantity with a numerical evaluation of the negativity of the partial transpose (NPT) considering a system of Bell states formed in the coherent state basis (quasi-Bell states).

Keywords: Wigner function, negativity, non-Gaussian state, nonclassicality, non-Gaussianity, quasi-Bell states, coherent states
