Increasing singlet fraction with entanglement swapping

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We consider entanglement swapping for certain mixed states. We assume that the initial states have the same singlet fraction and show that the final state can have singlet fraction greater than the initial states. We also consider two quantum teleportations and show that entanglement swapping can increase teleportation fidelity. Finally, we show how this effect can be demonstrated with linear optics.
5 pages, 4 figures

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Quantum Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/169271

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0805.1044
 http://arxiv.org/abs/0805.1044
 Phys. Rev. A 78, 032321 (2008)
 doi:10.1103/PhysRevA.78.032321

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arXiv