Continuous-variable-entanglement swapping and its local certification: Entangling distant mechanical modes

@article{Abdi2014ContinuousvariableentanglementSA,
  title={Continuous-variable-entanglement swapping and its local certification: Entangling distant mechanical modes},
  author={Mehdi Abdi and Stefano Pirandola and Paolo Tombesi and David Vitali},
  journal={Physical Review A},
  year={2014},
  volume={89},
  pages={022331-1-022331-11}
}
We introduce a modification of the standard entanglement swapping protocol where the generation of entanglement between two distant modes is realized and verified using only local optical measurements. We show, indeed, that a simple condition on the purity of the initial state involving also an ancillary mode is sufficient to guarantee the success of the protocol by local measurements {M. Abdi \textit{et al.}, Phys. Rev. Lett. \textbf{109}, 143601 (2012)}]. We apply the proposed protocol to a… 

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