Generation of multi-photon entanglement by propagation and detection

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We investigate the change of entanglement of photons due to propagation. We find that post-selected entanglement in general varies by propagation and, as a consequence, states with maximum bi- and tri-partite entanglement can be generated from propagation of unentangled photons. We generalize the results to n photons and show that entangled states with permutation symmetry can be generated from propagation of unentangled states. Generation of n-photon GHZ states is discussed as an example of a class of states with the desired symmetry.
9 pages, 8 figues

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Quantum Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/222090

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0903.0389
 http://arxiv.org/abs/0903.0389

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arXiv