Witnessing multipartite entanglement
classification
🪐 quant-ph
keywords
entanglementmultipartiteexperimentaloperatorsstateswitnessapplycanonical
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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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