Experimental detection of multipartite entanglement using witness operators |
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| Authors: | Bourennane Mohamed Eibl Manfred Kurtsiefer Christian Gaertner Sascha Weinfurter Harald Gühne Otfried Hyllus Philipp Bruss Dagmar Lewenstein Maciej Sanpera Anna |
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| Affiliation: | Max-Planck-Institut für Quantenoptik, D-85748 Garching, Germany. |
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| Abstract: | 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. |
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