Stationary entanglement in N-atom subradiant degenerate cascade systems

Details Stationary entanglement in N-atom subradiant degenerate cascade systems Stationary entanglement in N-atom subradiant degenerate cascade systems

2010-07-22

arxiv.org/abs/1007.3825v1

Phys. Rev. A 83, 013621 (2011)

Physics

Quantum Physics

4 figures

Scientific paper

10.1103/PhysRevA.83.013621

We address ultracold $N$-atom degenerate cascade systems and show that stationary subradiant states, already observed in the semiclassical regime, also exist in a fully quantum regime and for a small number of atoms. We explicitly evaluate the amount of stationary entanglement for the two-atom configuration and show full inseparability for the three-atom case. We also show that a continuous variable description of the systems is not suitable to detect entanglement due to the nonGaussianity of subradiant states.

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