Full multipartite entanglement of frequency comb Gaussian states
arXiv:1409.5692 · doi:10.1103/PhysRevLett.114.050501
Abstract
An analysis is conducted of the multipartite entanglement for Gaussian states generated by the parametric down-conversion of a femtosecond frequency comb. Using a recently introduced method for constructing optimal entanglement criteria, a family of tests is formulated for mode decompositions that extends beyond the traditional bipartition analyses. A numerical optimization over this family is performed to achieve maximal significance of entanglement verification. For experimentally prepared 4-, 6-, and 10-mode states, full entanglement is certified for all of the 14, 202, and 115974 possible nontrivial partitions, respectively.
arXiv commentclose to published version, see also viewpoint http://physics.aps.org/articles/v8/10
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