Quantum repeater protocol in mixed single- and two-mode Tavis-Cummings models

Abstract

In this paper we study the production of entanglement between two atoms which are far from each other. We consider a system including eight two-level atoms (1; 2;... ; 8) such that any atom with its adjacent atom is in atomic Bell state, so that we have four separate pairs of maximally entangled states (i; i + 1) where i = 1; 3; 5; 7. Our purpose is to produce entanglement between the atomic pair (1, 8), while these two distant atoms have no interaction. By performing the interaction between adjacent nonentangled atomic pairs (2, 3) as well as (6, 7), each pair with a two-mode quantized field, the entanglement is produced between atoms (1, 4) and (5, 8), respectively. Finally, by applying an appropriate Bell state measurement (BSM) on atoms (4, 5) or performing an interaction between them with a single-mode field (quantum electrodynamic: QED method), the qubit pair (1; 8) becomes entangled and so the quantum repeater is successfully achieved. This swapped entanglement is then quantified via concurrence measure and the effects of coupling coeficients and detuning on the concurrence and success probability are numerically investigated. The maxima of concurrence and success probability and the corresponding time periods have been decreased by increasing the detuning in asymmetric condition in BSM method. Also, the effects of detuning, initial interaction time and coupling coeficient on the produced entanglement by QED method are considered. Increasing (decreasing) of the detuning (interaction time) has destructive effect on the swapped entanglement in asymmetric condition.

References in corpus (9)

• Quantum Repeaters with Photon Pair Sources and Multi-Mode Memories
• Effective Hamiltonian Theory and Its Applications in Quantum Information
• Two-photon probe of the Jaynes-Cummings model and symmetry breaking in circuit QED
• Hybrid quantum repeater based on dispersive CQED interactions between matter qubits and bright coherent light
• Robust and Efficient Quantum Repeaters with Atomic Ensembles and Linear Optics
• Induced Entanglement Enhanced by Quantum Criticality
• Dissipative entanglement swapping in the presence of detuning and Kerr medium: Bell state measurement method
• Entanglement Swapping Between Dissipative Systems
• Efficient quantum repeater in perspectives of both entanglement concentration rate and LOCC complexity

Cited by in corpus (6)

• Distributing entangled state using quantum repeater protocol: Trapped atomic ions in optomechanical cavities
• Quantum repeater protocol using an arrangement of QED-optomechanical hybrid systems
• Toward a quantum repeater protocol based on the coherent state approach
• Teleportation of squeezed states in the absence and presence of dissipation
• Quantum repeater using three-level atomic states in the presence of dissipation: stability of entanglement
• Distributed entangled state production by using quantum repeater protocol