title: Full multipartite entanglement of frequency-comb Gaussian states.
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 115 974 possible nontrivial partitions, respectively.
authors.affiliation: Arbeitsgruppe Theoretische Quantenoptik, Institut für Physik, Universität Rostock, D-18051 Rostock, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Gerke
authors.affiliation: Arbeitsgruppe Theoretische Quantenoptik, Institut für Physik, Universität Rostock, D-18051 Rostock, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Sperling
authors.affiliation: Arbeitsgruppe Theoretische Quantenoptik, Institut für Physik, Universität Rostock, D-18051 Rostock, Germany.
authors.forename: W
authors.initials: W
authors.lastname: Vogel
authors.affiliation: Laboratoire Kastler Brossel, Sorbonne Universités-UPMC, École Normale Supérieure, Collège de France, CNRS, 4 place Jussieu, 75252 Paris, France.
authors.forename: Y
authors.initials: Y
authors.lastname: Cai
authors.affiliation: Laboratoire Kastler Brossel, Sorbonne Universités-UPMC, École Normale Supérieure, Collège de France, CNRS, 4 place Jussieu, 75252 Paris, France.
authors.forename: J
authors.initials: J
authors.lastname: Roslund
authors.affiliation: Laboratoire Kastler Brossel, Sorbonne Universités-UPMC, École Normale Supérieure, Collège de France, CNRS, 4 place Jussieu, 75252 Paris, France.
authors.forename: N
authors.initials: N
authors.lastname: Treps
authors.affiliation: Laboratoire Kastler Brossel, Sorbonne Universités-UPMC, École Normale Supérieure, Collège de France, CNRS, 4 place Jussieu, 75252 Paris, France.
authors.forename: C
authors.initials: C
authors.lastname: Fabre