Maximally entangled mixed states: Creation and concentration

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

doi:10.1103/PhysRevLett.92.133601

Maximally entangled mixed states: Creation and concentration

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

Computational Sciences & Engineering Div

Research output: Contribution to journal › Article › peer-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 language	English
Article number	133601
Pages (from-to)	133601-1-133601-4
Journal	Physical Review Letters
Volume	92
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevLett.92.133601
State	Published - Apr 2 2004

Funding

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

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10.1103/PhysRevLett.92.133601

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Maximally entangled mixed states: Creation and concentration

Abstract

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