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Detection of entanglement with few local measurements

Abstract:
We introduce a general method for the experimental detection of entanglement by performing only few local measurements, assuming some prior knowledge of the density matrix. The idea is based on the minimal decomposition of witness operators into a pseudo-mixture of local operators. We discuss an experimentally relevant case of two qubits, and show an example how bound entanglement can be detected with few local measurements.
Publication status:
Published

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Publisher copy:
10.1103/PhysRevA.66.062305

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Journal:
Phys. Rev. A
Volume:
66
Issue:
6
Pages:
062305
Publication date:
2002-05-15
DOI:
EISSN:
1094-1622
ISSN:
1050-2947
URN:
uuid:991baaea-8483-48a1-b023-f5d4cd32fd36
Source identifiers:
156655
Local pid:
pubs:156655
Language:
English
Keywords:

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