2002/05/31 by O. Guehne, P. Hyllus, D. Bruss +4 · 1 citation
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physreva.66.062305
published as Phys. Rev. A 66, 062305 (2002) · 5 pages + 1 figure
arxiv created 2002/10/08 · arxiv updated 2009/12/01
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.