Nonlocality of cluster states of qubits
- Author(s)
- Valerio Scarani, Antonio Acin, E Schenck, Markus Aspelmeyer
- Abstract
We investigate cluster states of qubits with respect to their nonlocal properties. We demonstrate that a Greenberger-Horne-Zeilinger (GHZ) argument holds for any cluster state: more precisely, it holds for any partial, thence mixed, state of a small number of connected qubits (five, in the case of one-dimensional lattices). In addition, we derive a Bell inequality that is maximally violated by the four-qubit cluster state and is not violated by the four-qubit GHZ state.
- Organisation(s)
- External organisation(s)
- The Institute of Photonic Sciences, École Normale Supérieure, Paris
- Journal
- Physical Review A
- Volume
- 71
- No. of pages
- 5
- ISSN
- 1050-2947
- DOI
- https://doi.org/10.1103/PhysRevA.71.042325
- Publication date
- 2005
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103026 Quantum optics
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/nonlocality-of-cluster-states-of-qubits(8972dc55-4abb-49c0-8529-aca6a4f3f3d0).html