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Physica Scripta

Simple schemes for generating the three-atom W state and the Greenberger–Horne–Zeilinger state among nonidentical atoms

Xin Ji, Tianquan Lü, Shou Zhang

Published Apr 29, 2009• 2 citations
Publisher

Abstract

We present two schemes for generating the three-atom W state and the GHZ state with one ?-type atom and two 2-level atoms interacting resonantly with two modes or one mode of a two-mode field in turns. The schemes neither require the three atoms to go through the cavity simultaneously (which is difficult to realize in experiment), nor require the detection of photons. The schemes work beyond the strong-coupling regime, so that we can obtain high-fidelity entanglement.

DOI
10.1088/0031-8949/79/05/055402

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We present two schemes for generating the three-atom W state and the GHZ state with one ?-type atom and two 2-level atoms interacting resonantly with two modes or one mode of a two-mode field in turns. The schemes neither require the three atoms to go through the cavity simultaneously (which is difficult to realize in experiment), nor require the detection of photons. The schemes work beyond the strong-coupling regime, so that we can obtain high-fidelity entanglement.
We propose two schemes to engineer four-partite entangled Greenberger-Horne-Zeilinger (GHZ) and WWW states in a deterministic way by using chains of (two-level) Rydberg atoms within the framework of cavity QED. These schemes are based on the resonant interaction of the atoms with a bimodal cavity that simultaneously supports, in contrast to a single-mode cavity, two independent modes of the photon field. In addition, we suggest the schemes to reveal the nonclassical correlations for the engineered GHZ and WWW states. It is shown how these schemes can be extended in order to produce general NNN-partite entangled GHZ and WWW states.
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