GENERATION OF MAXIMALLY ENTANGLED STATES IN PUMPED NONLINEAR COUPLERS INDUCED BY BROADBAND LASER LIGHT

Hong Sang Thi Nguyen, Thu Oanh Thi Luong, Lanh Van Chu, Tuan Quoc Doan, Thuy Thi Le, Thanh Binh Thi Le, Khoa Quoc Doan

Abstract


In this paper, model of optical state truncation of two cavity modes are analysed. The Kerr nonlinear coupler with two of them pumped by external classical fields, which is assumed to be decomposed into two parts: a coherent part and a 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 and compare these results with that obtained previously in the literature.


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