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Covariance, correlation and entanglement


Davis, RIA and Delbourgo, R and Jarvis, PD, Covariance, correlation and entanglement, Journal of Physics A-Mathematical and General, 33, (9) pp. 1895-1914. ISSN 0305-4470 (2000) [Refereed Article]

DOI: doi:10.1088/0305-4470/33/9/312


Some new identities for quantum variance and covariance involving commutators are presented, in which the density matrix and the operators are treated symmetrically. A measure of entanglement is proposed for bipartite systems, based upon covariance. This works for two-and three-component systems but produces ambiguities for multicomponent systems of composite dimension. Its relationship to angular momentum dispersion for symmetric spin states is described.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Other physical sciences
Research Field:Other physical sciences not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Davis, RIA (Mr Richard Ian Arthur Davis)
UTAS Author:Delbourgo, R (Professor Robert Delbourgo)
UTAS Author:Jarvis, PD (Dr Peter Jarvis)
ID Code:18570
Year Published:2000
Web of Science® Times Cited:11
Deposited By:Physics
Deposited On:2000-08-01
Last Modified:2001-05-07

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