  We have derived a general separability criterion for a class of two mode
non-Gaussian continuous variable systems, obtained earlier using PPT, violation
of which provides sufficient condition for entanglement. It has been obtained
by utilizing the Cauchy-Schwarz inequality and from the basic definition of
separable states. This criterion coincides with the work of Agarwal and Biswas
[4] which involved inequality involving higher order correlation, for testing
entanglement in non-Gaussian states.
