Probing multipartite entanglement in a coupled Jaynes-Cummings system

Details Probing multipartite entanglement in a coupled Jaynes-Cummings system Probing multipartite entanglement in a coupled Jaynes-Cummings system

2012-04-07

arxiv.org/abs/1204.1680v1

Physics

Quantum Physics

Scientific paper

We show how to probe multipartite entanglement in $N$ coupled Jaynes-Cummings cells where the degrees of freedom are the electronic energies of each of the $N$ atoms in separate single-mode cavities plus the $N$ single-mode fields themselves. Specifically we propose probing the combined system as though it is a dielectric medium. The spectral properties and transition rates directly reveal multipartite entanglement signatures. It is found that the Hilbert space of the $N$ cell system can be confined to the totally symmetric subspace of two states only that are maximally-entangled W states with 2N degrees of freedom. The subspace of the remaining $2N-2$ states is comprises optically inactive quadripartite states.

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