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.
@article{arxiv.1409.5692,
title = {Full multipartite entanglement of frequency comb Gaussian states},
author = {S. Gerke and J. Sperling and W. Vogel and Y. Cai and J. Roslund and N. Treps and C. Fabre},
journal= {arXiv preprint arXiv:1409.5692},
year = {2015}
}
Comments
close to published version, see also viewpoint http://physics.aps.org/articles/v8/10