Maximally entangled mixed states: Creation and concentration

Nicholas A. Peters, Joseph B. Altepeter, David Branning, Evan R. Jeffrey, Tzu Chieh Wei, Paul G. Kwiat

Research output: Contribution to journalArticlepeer-review

127 Scopus citations

Abstract

The extension of the boundaries of experimentally accessible two-qubit Hilbert space using correlated photons from parametric down-conversion was investigated. Maximally entangled mixed states that lie above the Werner boundary in the linear entropy-tangle plane were created and characterized. A sensitivity imbalance in common state measures such as the tangle, linear entropy and fidelity was also investigated. It was demonstrated that the mixed states can be efficiently concentrated, simultaneously increasing both the purity and the degree of entanglement.

Original languageEnglish
Article number133601
Pages (from-to)133601-1-133601-4
JournalPhysical Review Letters
Volume92
Issue number13
DOIs
StatePublished - Apr 2 2004
Externally publishedYes

Funding

This work was supported by the DCI, ARDA, and NSF Grant No. EIA-0121568.

FundersFunder number
National Science FoundationEIA-0121568
Directorate for Computer and Information Science and Engineering0121568
Duke Cancer Institute
Agricultural Research Development Agency

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