Quantum correlations and entanglement in a model comprised of a short chain of nonlinear oscillators
We discuss a model comprised of a chain of three Kerr like nonlinear oscillators pumped by two modes of external coherent field. We show that the system can be treated as nonlinear quantum scissors and behave as a three qubit model. For such situation, different types of tripartite entangled states can be generated, even when damping effects are present in the system. Some amount of such entanglement can survive even in a long time limit. The flow of bipartite entanglement between subsystems of the model and relations among first order correlations, second order correlations, and the entanglement are discussed.