Entangling two separable qubits using an entangled field state

In this paper, entanglement transfer from parity pair coherent states to separable qubits is studied. Parity pair coherent states are defined as superposition of pair coherent states. The entanglement of these states is obtained studying their entropy. We observe that the entanglement of the parity pair coherent states is a decreasing function of the photon number differences between the two modes. The interaction between the latter and the qubit system is studied considering Jaynes-Cummings model. The entanglement of the qubit system after interaction is calculated using concurrence. Our results reveal that the maximum of entanglement is achieved if the two modes have equal photon number. In addition, we observe that the maximum entanglement of the qubit system is an increasing (decreasing) function of the photon number difference between the two modes contingent on its odd (even) value.