Perfect correlations of three-particle entangled states in cavity QED

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Abstract
Compared to two-particle states, entangled states of three or four particles can lead to a much stronger test of local realism than is possible with Bell inequalities. It is the purpose of this paper to mention an exactly soluble quantum model in which entanglement of atomic states with cavity photon states leads to a perfectly correlated three-particle state. We demonstrate how to realize this model atom-field system and to create and observe such states, in the context of cavity quantum electrodynamics.