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. 
J. K. Kalaga, A. Kowalewska-Kud{\l}aszyk, W. Leo\'nski and A.   Barasi\'nski
quant-ph