Creating and probing multipartite macroscopic entanglement with light.

@article{Paternostro2007CreatingAP,
  title={Creating and probing multipartite macroscopic entanglement with light.},
  author={Mauro Paternostro and David Vitali and Sylvain Gigan and M. S. Kim and {\vC}aslav Brukner and Jens Eisert and Markus Aspelmeyer},
  journal={Physical review letters},
  year={2007},
  volume={99 25},
  pages={
          250401
        }
}
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. 

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