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Acta Physica Hungarica B) Quantum Electronics

Nonlinear Coupler and Bell-Like States Generation

W. Leoński, A. Kowalewska-Kudłaszyk

Published Apr 1, 2005• 0 citations
Publisher
DOI
10.1556/aph.23.2005.1-2.8

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We discuss a model comprising two coupled nonlinear oscillators (Kerr-like nonlinear coupler) with one of them pumped by an external coherent excitation. Applying the method of nonlinear quantum scissors we show that the quantum evolution of the coupler can be closed within a finite set of n -photon Fock states. Moreover, we show that the system is able to generate Bell-like states and, as a consequence, the coupler discussed behaves as a two-qubit system. We also analyse the effects of dissipation on entanglement of formation parametrized by concurrence.