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Hyperentangled mixed phased Dicke states: optical design and detection
1Dipartimento di Fisica, Sapienza Universitá di Roma, I-00185 Roma, Italy.
Physical Review Letters
|January 15, 2011
Abstract:
A recently introduced family of multipartite entangled states, the 4-qubit phased Dicke states, has been created by 2-photon hyperentanglement. Our experimental method allows high state fidelity and generation rate. By introducing quantum noise in the multipartite system in a controlled way, we have tested the robustness of these states. To this purpose the entanglement of the resulting multipartite entangled mixed states has been verified by using a new kind of structural witness.

