Abstract
The nonlinear coupler, which consists of two nonlinear oscillators linearly coupled together and one or two of these oscillators excited by external coherent fields, is investigated. We show that evolution of the nonlinear coupler is possible closed in a finite set of n-photon Fock states and can create Bell-like states. Especially, the entropy of entanglement and the Bell-like states vary dramatically with the different initial conditions are discussed. These results are compared with that obtained previously in the literature.
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