title: Operational determination of multiqubit entanglement classes via tuning of local operations.
abstract: We present a physical setup with which it is possible to produce arbitrary symmetric long-lived multiqubit entangled states in the internal ground levels of photon emitters, including the paradigmatic Greenberger-Horne-Zeilinger and W states. In the case of three emitters, where each tripartite entangled state belongs to one of two well-defined entanglement classes, we prove a one-to-one correspondence between well-defined sets of experimental parameters, i.e., locally tunable polarizer orientations, and multiqubit entanglement classes inside the symmetric subspace.
authors.affiliation: Institut de Physique Nucléaire, Atomique et de Spectroscopie, Université de Liège, 4000 Liège, Belgium.
authors.forename: T
authors.initials: T
authors.lastname: Bastin
authors.forename: C
authors.initials: C
authors.lastname: Thiel
authors.forename: J
authors.initials: J
authors.lastname: von Zanthier
authors.forename: L
authors.initials: L
authors.lastname: Lamata
authors.forename: E
authors.initials: E
authors.lastname: Solano
authors.forename: G S
authors.initials: GS
authors.lastname: Agarwal