Superbroadcasting of mixed states

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We derive the optimal universal broadcasting for mixed states of qubits. We show that the nobroadcasting theorem cannot be generalized to more than a single input copy. Moreover, for four or more input copies it is even possible to purify the input states while broadcasting. We name such purifying broadcasting superbroadcasting.
4 pages, 4 figures, to appear on Phys. Rev. Lett

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Quantum Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/126063

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/quant-ph/0506251
 http://arxiv.org/abs/quant-ph/0506251
 Phys. Rev. Lett. 95, 060503 (2005)
 doi:10.1103/PhysRevLett.95.060503

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