Tripartite entanglement transfer from flying modes to localized qubits

Details Tripartite entanglement transfer from flying modes to localized qubits Tripartite entanglement transfer from flying modes to localized qubits

2008-11-04

arxiv.org/abs/0811.0497v1

Phys. Rev. A 79, 022307 (2009)

Physics

Quantum Physics

12 pages, 12 figs

Scientific paper

10.1103/PhysRevA.79.022307

We investigate the process of entanglement transfer from a three-mode quantized field to a system of three spatially separated qubits each one made of a two-level atom resonantly coupled to a cavity mode. The optimal conditions for entanglement transfer, evaluated by atomic tripartite negativity, are derived for radiation prepared in qubit-like and Gaussian entangled states in terms of field parameters, atom-cavity interaction time, cavity mirror losses, and atomic preparation. For qubit-like states we found that for negligible cavity losses some states may completely transfer their entanglement to the atoms and/or be exactly mapped to the atomic state, whereas for Gaussian states we found a range of field parameters to obtain a large entanglement transfer. The purity of the three-qubit states and the entanglement of two-qubit subsystems are also discussed in some details.

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