dorsal/arxiv
View SchemaExperimental violation of a cluster state Bell inequality
| Authors | Philip Walther, Markus Aspelmeyer, Kevin J. Resch, Anton Zeilinger |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0507086 |
| URL | https://arxiv.org/abs/quant-ph/0507086 |
| DOI | 10.1103/PhysRevLett.95.020403 |
| Journal | Phys. Rev. Lett. 95, 020403 (2005) |
Abstract
Cluster states are a new type of multiqubit entangled states with entanglement properties exceptionally well suited for quantum computation. In the present work, we experimentally demonstrate that correlations in a four-qubit linear cluster state cannot be described by local realism. This exploration is based on a recently derived Bell-type inequality [V. Scarani et al., Phys. Rev A 71, 042325 (2005)] which is tailored, by using a combination of three- and four-particle correlations, to be maximally violated by cluster states but not violated at all by GHZ states. We observe a cluster state Bell parameter of $2.59\pm 0.08$, which is more than 7 standard deviations larger than the threshold of 2 imposed by local realism.
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"abstract": "Cluster states are a new type of multiqubit entangled states with\nentanglement properties exceptionally well suited for quantum computation. In\nthe present work, we experimentally demonstrate that correlations in a\nfour-qubit linear cluster state cannot be described by local realism. This\nexploration is based on a recently derived Bell-type inequality [V. Scarani et\nal., Phys. Rev A 71, 042325 (2005)] which is tailored, by using a combination\nof three- and four-particle correlations, to be maximally violated by cluster\nstates but not violated at all by GHZ states. We observe a cluster state Bell\nparameter of $2.59\\pm 0.08$, which is more than 7 standard deviations larger\nthan the threshold of 2 imposed by local realism.",
"arxiv_id": "quant-ph/0507086",
"authors": [
"Philip Walther",
"Markus Aspelmeyer",
"Kevin J. Resch",
"Anton Zeilinger"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.95.020403",
"journal_ref": "Phys. Rev. Lett. 95, 020403 (2005)",
"title": "Experimental violation of a cluster state Bell inequality",
"url": "https://arxiv.org/abs/quant-ph/0507086"
},
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