outcome, the result obtained here entails that the driving mechanism is required if one wishes to generate strongly entangled light at steady state for the system under consideration.

Comparison of the degree of entanglement
========================================

It is a well known fact that the criteria used to detect the degree of entanglement of the continuous variable composite system are of different kind and also related to different physical contexts. It so happens that generally they do not lead to similar conclusion since predominantly they are emanated from different principles and assumptions. In order to get a clear understanding of the nature of entanglement, it would be necessary studying the relation among the predictions of various criteria. With this understanding, in the following, the evolution of the entanglement that was obtained applying the criterion of logarithmic negativity is compared with the DGCZ and HZ criteria.

Duan-Giedke-Cirac-Zoller criteria
---------------------------------

In this section, the nature of entanglement as predictable by the criterion following from the variance of the Einstein-Podolsky-Rosen (EPR) type quadrature operators [@pr47777] is compared with logarithmic negativity that is employed in the preceding section of this work. Previous study shows that the nature of the predicted degree of entanglement by the two 