title: Creating and probing multipartite macroscopic entanglement with light.
abstract: We propose an immediately realizable scheme showing signatures of multipartite entanglement generated by radiation pressure in a cavity system with a movable mirror. We show how the entanglement involving the inaccessible massive object is unraveled by means of field-field quantum correlations and persists within a wide range of working conditions. Our proposal provides an operative way to infer the quantum behavior of a system that is only partially accessible.
authors.affiliation: School of Mathematics and Physics, Queen's University, Belfast BT7 1NN, United Kingdom.
authors.forename: M
authors.initials: M
authors.lastname: Paternostro
authors.forename: D
authors.initials: D
authors.lastname: Vitali
authors.forename: S
authors.initials: S
authors.lastname: Gigan
authors.forename: M S
authors.initials: MS
authors.lastname: Kim
authors.forename: C
authors.initials: C
authors.lastname: Brukner
authors.forename: J
authors.initials: J
authors.lastname: Eisert
authors.forename: M
authors.initials: M
authors.lastname: Aspelmeyer