期刊
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
卷 44, 期 50, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1751-8113/44/50/505304
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资金
- MICINN [FIS2008-00781/FIS]
- FEDER (EU)
- Junta de Andalucia-Spain [FQM-2445, FQM-207]
- CONICET (Argentine Agency)
- CEI Bio-Tic GENIL-SPR
Some properties of the quantum discord based on the geometric measure advanced by Dakic et al (2010 Phys. Rev. Lett. 105 190502) are discussed here by recourse to a systematic survey of the two-qubit state-space, with emphasis on Werner and MEM states. We explore the dependence of quantum discord on the degree of mixedness of the bipartite states, and also its connection with non-locality as measured by the maximum violation of a Bell inequality within the CHSH scenario. Some considerations regarding the XY model are also made.
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