Comment on relationship between atomic squeezed and entangled states

Details Comment on relationship between atomic squeezed and entangled states Comment on relationship between atomic squeezed and entangled states

2001-10-05

arxiv.org/abs/quant-ph/0110032v1

Physics

Quantum Physics

5 pages, no figure

Scientific paper

The ability of parameter recently proposed by Sorensen et al. (Nature, 409, 63 (2001)) to characterize entanglement or inseparability is investigated for a system of two two-level atoms interacting with a single mode of radiation field. For comparison we employ the necessary and sufficient criterion of Peres and Horodecki for inseparability of bipartite states. We show that for diagonal atomic density matrix the parameter of Sorensen et al. fails to show entangled nature of collective atomic state whereas same state is inseparable in accordance with Peres-Horodecki criterion.

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