Superbroadcasting of mixed states

Details Superbroadcasting of mixed states Superbroadcasting of mixed states

2005-06-29

arxiv.org/abs/quant-ph/0506251v1

Phys. Rev. Lett. 95, 060503 (2005)

Physics

Quantum Physics

4 pages, 4 figures, to appear on Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.95.060503

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.

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