Abstract
In this paper, using an entangled three-mode field state, we study the production of entanglement in a three- qubit system. The entangled three-mode field state is defined as superposed three-mode nonlinear coherent state, which is shown to be entangled as an increasing function of the coherency parameter. The interaction between the field state and a system of three separable qubits is considered under Jaynes–Cummings model. Our study reveals that the three-qubit system becomes entangled after the interaction and the entanglement can be tuned by changing the coherency parameter of the initial field state. In addition, we show how population inversion is affected by the interaction.
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