Journal
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
Volume 42, Issue 5, Pages 1001-1013Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1023/A:1025422606845
Keywords
entanglement; entanglement witnesses; threepartite systems; local measurements
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In this paper we describe how three qubit entanglement can be analyzed with local measurements. For this purpose we decompose entanglement witnesses into operators that can be measured locally. Our decompositions are optimized in the number of measurement settings needed for the measurement of one witness. Our method allows to detect true threepartite entanglement and especially GHZ-states with only four measurement settings.
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