Entanglement transfer from entangled three-mode nonlinear coherent states to separable qubits

Davood Afshar, Azam Anbaraki, Mojtaba Jafarpour

Mahmoud Abdel‐Aty, A.‐S. F. Obada

Azam Anbaraki, Davood Afshar, Mojtaba Jafarpour

We study entanglement transfer from even and odd two-mode nonlinear coherent states to two separable qubits. The separable qubits are assumed to be in the following three states: both of the qubits are in the ground state, one qubit is in the ground state and the other is in a mixed state, and both of them are in a mixed state. The interaction between the field states and the system of qubits is considered under the Jaynes–Cummings model. We use negativity to evaluate the entanglement transfer to the system of qubits after interaction with the field states. The conditions for the production of the maximum amount of entanglement between qubits will be discussed. We observe that the maximum value of entanglement transfer is related to the interaction of odd nonlinear coherent states with the qubits when both of the latter are in the ground state.

Azam Anbaraki, Davood Afshar

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.

János K. Asbóth, Петер Адам, Mátyás Koniorczyk +1 more

Piroska Dömötör, M. G. Benedict