Relative state measures of correlations in bipartite quantum systems
2012 (English)In: Quantum information & computation, ISSN 1533-7146, Vol. 12, no 1-2, 119-137 p.Article in journal (Refereed) Published
Everett's concept of relative state can be viewed as a map that contains information about correlations between measurement outcomes on two quantum systems. We demonstrate how geometric properties of the relative state map can be used to develop operationally well-defined measures of the total correlation in bipartite quantum systems of arbitrary state space dimension. These measures are invariant under local unitary transformations and non-increasing under local operations. We show that some known correlation measures have a natural interpretation in terms of relative states.
Place, publisher, year, edition, pages
2012. Vol. 12, no 1-2, 119-137 p.
Quantum entanglement, correlations in quantum states, relative states
Research subject Physics
IdentifiersURN: urn:nbn:se:uu:diva-149286ISI: 000300538000008OAI: oai:DiVA.org:uu-149286DiVA: diva2:404396
Additional address (E. Sjöqvist): Centre for Quantum Technologies, NUS, Singapore2011-03-172011-03-172012-03-20Bibliographically approved