Entanglement and the SU(2) phase states in atomic systems

Details Entanglement and the SU(2) phase states in atomic systems Entanglement and the SU(2) phase states in atomic systems

2002-02-07

arxiv.org/abs/quant-ph/0202041v3

PRA, 66, 022111 (2002)

Physics

Quantum Physics

10 pages, 1 figure

Scientific paper

10.1103/PhysRevA.66.022111

We show that a system of 2n identical two-level atoms interacting with n cavity photons manifests entanglement and that the set of entangled states coincides with the so-called SU(2) phase states. In particular, violation of classical realism in terms of the GHZ and GHSH conditions is proved. We discuss a new property of entanglement expressed in terms of local measurements. We also show that generation of entangled states in the atom-photon systems under consideration strongly depends on the choice of initial conditions and that the parasitic influence of cavity detuning can be compensated through the use of Kerr medium.

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