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Greenberger-Horne-Zeilinger-type violation of local realism by mixed states | X.-Q. Zhou
; C.-Y. Lu
; W.-B. Gao
; J. Zhang
; Z.-B. Chen
; T. Yang
; J.-W. Pan
; | Date: |
12 May 2008 | Abstract: | Cluster states are multi-particle entangled states with special entanglement
properties particularly suitable for quantum computation. It has been shown
that cluster states can exhibit Greenberger-Horne-Zeilinger (GHZ)-type
non-locality even when some of their qubits have been lost. In the present
work, we generated a four-photon mixed state, which is equivalent to the
partial, qubit-loss state of an N-qubit cluster state up to some local
transformations. By using this mixed state, we then realize a GHZ-type
violation of local realism. Our results not only demonstrate a mixed state’s
GHZ-type non-locality but also exhibit the robustness of cluster states under
qubit-loss conditions. | Source: | arXiv, 0805.1468 | Services: | Forum | Review | PDF | Favorites |
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