Entanglement transfer from entangled non-linear coherent states of trapped ions to separable qubits

In this paper, we consider the possibility of transferring entanglement from two-mode superposed nonlinear coherent states of trapped ions to separable qubits. Separable qubits are assumed to be in the ground state and each mode of the field states interacts with each one of the qubits tinder Jaynes-Cummings model. We find that there is an explicit dependence between the amount of transferred entanglement to the qubits and Lamb-Dicke parameter of the field states. Moreover, there is a correlation,between the entanglement of qubits after interaction and the entanglement strength of the field states before that. In fact, qubits will have maximum amount of entanglement after the interaction with the maximally entangled field states in some ranges of the coherent amplitude, periodically. (C) 2017 Elsevier B.V. All rights reserved.