Local uncertainty relations serving as measures of entanglement in a bipartite two-level system
2006 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 73, no 1Article in journal (Refereed) Published
We comment on the recent suggestion to use a family of local uncertainty relations as a standard way of quantifying entanglement in two-qubit systems. Some statements made on the applicability of the proposed measures are overly optimistic. We exemplify how these specific measures fall short, and present a minor modification of the general theory which uses the same experimentally gathered information, but in a slightly different, better way.
Place, publisher, year, edition, pages
2006. Vol. 73, no 1
quantum-state tomography, discrete wigner function, separability criterion, ensembles, information
IdentifiersURN: urn:nbn:se:kth:diva-15400DOI: 10.1103/PhysRevA.73.012319ISI: 000235008900048ScopusID: 2-s2.0-33144471070OAI: oai:DiVA.org:kth-15400DiVA: diva2:333441
QC 201005252010-08-052010-08-05Bibliographically approved