Detection of entanglement with few local measurements

Details Detection of entanglement with few local measurements Detection of entanglement with few local measurements

2002-05-15

arxiv.org/abs/quant-ph/0205089v2

Phys. Rev. A 66, 062305 (2002)

Physics

Quantum Physics

5 pages + 1 figure

Scientific paper

10.1103/PhysRevA.66.062305

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.

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