Generation of entangled states by a linear coupling coupler pumped in two modes induced by broadband laser.

• The influence of the laser width on the possibility of generation Bell states is considered. • Exact formulas determining complex probability amplitudes for the system were obtained. • Probabilities to the system exist in the Bell states are shown. • The parameter b 0 is an important parameter to play the controlling role position and value of probabilities the system. We research on a Kerr nonlinear coupler comprising two nonlinear oscillations linearly couple with each other. This coupler is pumped by external classical fields, which are supposed to be decomposed into two parts: a coherent part and a randomly fluctuating chaotic component (white noise). We can see that the quantum evolution of the pumped couplers is closed in a Hilbert space of two-qubit spanned by single-photon and vacuum states only. Hence, the pumped couplers can treat as a system of two-qubit. Analysis of time evolution of the quantum entanglement shows that maximally entangled states can be generated in the system and compare these results with that obtained previously by other authors. [ABSTRACT FROM AUTHOR]