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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/9152

Title: Multiqubit nonlocality in families of 3-and 4-qubit entangled states
Authors: GHOSE, S
DEBNATH, S
SINCLAIR, N
KABRA, A
STOCK, R
Keywords: horne-zeilinger entanglement
quantum nonlocality
ghz states
teleportation
communication
inequality
Issue Date: 2010
Publisher: IOP PUBLISHING LTD
Citation: JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL, 43(44), -
Abstract: We investigate genuine multiqubit nonlocality in families of entangled 3- and 4-qubit pure states by analyzing a Bell-type inequality that is violated only if all qubits are nonlocally correlated. We present detailed numerical studies of the relationship between entanglement and violation of the Svetlichny Bell-type inequality in an experimentally accessible set of 3-qubit pure states, and identify the special nonlocality property of the maximal slice states in the space of all 3-qubit pure states. We also analyze nonlocal correlations in 3-qubit generalized Greenberger-Horne-Zeilinger (GHZ) states and extend our analysis to the case of 4-qubit generalized GHZ states. We show that like the 3-qubit case, some 4-qubit generalized GHZ states do not violate a Bell inequality that tests for genuine 4-qubit nonlocality. Furthermore, the location of the boundary between the states that do violate the inequality and those that do not is the same for the 3- and 4-qubit generalized GHZ states.
URI: http://dx.doi.org/10.1088/1751-8113/43/44/445301
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9152
http://hdl.handle.net/10054/9152
ISSN: 1751-8113
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