Experimental detection of multipartite entanglement using witness operators

We present the experimental detection of genuine multipartite entanglement using entanglement witness operators. To this aim, we introduce a canonical way of constructing and decomposing witness operators so that they can be directly implemented with present technology. We apply this method to three...

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Bibliographic Details
Published in:Physical review letters 2004-02, Vol.92 (8), p.087902-087902, Article 087902
Main Authors: Bourennane, Mohamed, Eibl, Manfred, Kurtsiefer, Christian, Gaertner, Sascha, Weinfurter, Harald, Gühne, Otfried, Hyllus, Philipp, Bruss, Dagmar, Lewenstein, Maciej, Sanpera, Anna
Format: Article
Language:English
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Summary:We present the experimental detection of genuine multipartite entanglement using entanglement witness operators. To this aim, we introduce a canonical way of constructing and decomposing witness operators so that they can be directly implemented with present technology. We apply this method to three- and four-qubit entangled states of polarized photons, giving experimental evidence that the considered states contain true multipartite entanglement.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.92.087902