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Gaussian multipartite quantum discord from classical mutual information

Bradshaw, Mark; Lam, Ping Koy; Assad, Syed


Quantum discord is a measure of non-classical correlations, which are excess correlations inherent in quantum states that cannot be accessed by classical measurements. For multipartite states, the classically accessible correlations can be defined by the mutual information of the multipartite measurement outcomes. In general the quantum discord of an arbitrary quantum state involves an optimisation of over the classical measurements which is hard to compute. In this paper, we examine the...[Show more]

CollectionsANU Research Publications
Date published: 2019
Type: Journal article
Source: Journal of Physics B: Atomic, Molecular and Optical Physics
DOI: 10.1088/1361-6455/ab443c


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