|
| related topics |
| {bell, inequality, local} |
| {particle, mechanics, theory} |
| {qubit, qubits, gate} |
| {state, states, entangled} |
| {trap, ion, state} |
|
Violating Bell's inequality beyond Cirel'son's bound
Adan Cabello
abstract: Cirel'son inequality states that the absolute value of the combination of
quantum correlations appearing in the Clauser-Horne-Shimony-Holt (CHSH)
inequality is bound by $2 \sqrt 2$. It is shown that the correlations of two
qubits belonging to a three-qubit system can violate the CHSH inequality beyond
$2 \sqrt 2$. Such a violation is not in conflict with Cirel'son's inequality
because it is based on postselected systems. The maximum allowed violation of
the CHSH inequality, 4, can be achieved using a Greenberger-Horne-Zeilinger
state.
- oai_identifier:
- oai:arXiv.org:quant-ph/0108084
- categories:
- quant-ph
- comments:
- REVTeX4, 4 pages
- doi:
- 10.1103/PhysRevLett.88.060403
- arxiv_id:
- quant-ph/0108084
- journal_ref:
- Phys. Rev. Lett. 88 (2002) 060403
- created:
- 2001-08-17
- updated:
- 2002-01-25
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