Kerr nonlinear coupler and entanglement

Details Kerr nonlinear coupler and entanglement Kerr nonlinear coupler and entanglement

2004-08-03

arxiv.org/abs/quant-ph/0408024v1

J. Optics B 6, S37-S42 (2004)

Physics

Quantum Physics

5 pages, 5 figures

Scientific paper

10.1088/1464-4266/6/3/007

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 analyze the effects of dissipation on entanglement of formation parametrized by concurrence.

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